<?xml version="1.0" encoding="utf-8" ?>
<rss version="2.0">
<channel>
<title>Chinese Journal of Magnetic Resonance Imaging RSS feed</title>
<link>http://www.med-sci.cn/cgzcx/en/contents_list.asp?issue=201605</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
<item>
<title><![CDATA[The correlation between multi-parametric MRI of prostate imaging reporting and data system score and transrectal ultrasound guided needle biopsy]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.05.001</link>
<description><![CDATA[Objective: To explore the correlation between prostate imaging reporting and data system score version 2 (PI-RADS V2) on multi-parametric MRI and transrectal ultrasound (TRUS) guided prostate biopsy. Materials and Methods: A retrospective analysis of multi-parametric MRI (Mp-MRI) was performed in 128 patients with pathologically proven prostate diseases including prostate cancer (n=75), benign prostatic hyperplasia (n=48) and prostatitis (n=5). All the patients underwent 3.0 T Mp-MR imaging and subsequently TRUS guided prostate biopsy. Two readers independently assessed T2WI, DWI, DCE for each examination by using the PI-RADS V2 score, blinded to the indication for the MR imaging. The location of one specific lesion per case was denoted. Spearman correlation analysis was used to compare differences between PI-RADS V2 score and pathological findings. ROC curve analysis was performed to determine sensitivity, specificity and accuracy. Results: PI-RADS V2 score showed a significant positive correlation with needle biopsy (Spearman's coefficient 0.887, P<0.01). PI-RADS V2 had an accuracy of 94.51%, a PPV of 97.22%, and a NPV of 91.07%. Sensitivity was 93.33%, and specificity was 96.23%. Conclusion: The study demonstrates the value of PI-RADS V2 to improve detection and risk stratification in patients with suspected cancer in treatment of prostate glands diseases.]]></description>
<pubDate>Fri,20 May 2016 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[The value of diagnosis for prostate cancer by combining DWI with MRS]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.05.002</link>
<description><![CDATA[Objective: To investigate the value of diagnosis for prostate cancer (PCa) by combining diffusion weighted imaging (DWl) with magnetic resonance spectroscopy (MRS). Materials and Methods: Twenty-four cases of PCa and 30 cases of benign prostate hyperplasia (BPH) proved by pathology were examined by DWI and MRS. Apparent diffusion coefficient (ADC) values of cancerous regions and peripheral zone and central glands in BPH were measured. The chemical shift of citrate (Cit), choline (Cho), creatine (Cr) spectra, and the ratio of (Cho+Cr)/Cit were observed in MRS. The upper bound of 95 confidence interval of PCa ADC and (Cho+Cr)/Cit was set as the threshold value. The sensitivity, specificity and accuracy of DWI, MRS and DWI+MRS in the diagnosis of PCa were analyzed. Results: The ADC value of cancerous, peripheral zone and central glands in BPH were (0.83±0.12)×10–3 mm2/s, (1.82±0.26)×10–3 mm2/s, (1.46±0.16)×10–3 mm2/s (F=31.1, P<0.05). The (Cho+Cr)/Cit value of cancerousperipheral zone and central glands in BPH were 1.55±0.11, 0.53±0.16, 0.64±0.13 (F=18.2, P<0.05). There were significant difference between cancerous and peripheral zone, central glands of BPH in the value of (Cho+Cr)/Cit respectively (P<0.05). There was no significant difference between peripheral zone and central glands of BPH in the value of (Cho+Cr)/Cit (P>0.05).The diagnostic sensitivity, specificity and accuracy of DWI were 79.17%, 80%, 79.63%, respectively. The diagnostic sensitivity, specificity and accuracy of MRS were 87.5%, 86.67%, 87.03%, respectively. The diagnostic sensitivity, specificity and accuracy of DWI+MRS were 91.67%, 93.33%, 92.59%,respectively. Conclusions: The combined application with DWI and MRS was better than DWl or MRS alone in the diagnosis for prostate cancer.]]></description>
<pubDate>Fri,20 May 2016 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Feasibility study of FA and ADC values by diffusion tensor imaging: classify abnormal signal nodules in prostate transition zone]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.05.003</link>
<description><![CDATA[Objective: To investigate the diagnostic utility of FA (fractional anisotropy) and ADC (apparent diffusion coefficient) values of diffusion tensor imaging (DTI) in classifying abnormal signal nodules in prostate transition zone (TZ). Materials and Methods: Fifty-four TZ-PCa cases and thirty BPH cases with pathologically confirmed were enrolled in this retrospective study. All the patients were divided into 3 groups: BPH, Gleason score (GS)≤3+4=7, GS≥4+3=7, and underwent with 3.0 T MRI. The FA and ADC values of the region of interest (ROI) were respectively measured, using one-way ANOVA to compare the difference between groups. Results: The mean FA values of the 3 groups were 150.52±29.63, 215.21±54.59, 251.01±59.47, respectively, and there was statistical difference between the groups (F=32.882, P=0.000). Comparison among groups: just BPH with the other two groups had statistical difference (P=0.000, P=0.000). The mean ADC values (×10–6 mm2/s) of the 3 groups were 1606.11±234.64, 854.00±172.29, 742.78±115.91, respectively, and there was statistical difference between the groups (F=202.928, P=0.000). Comparison among groups: BPH with the other two groups had statistical difference (P=0.000, P=0.000). GS≤3+4=7 and GS≥4+3=7 had statistical difference (P=0.040). Conclusions: The FA and ADC values of DTI have higher value for distinguishing benign and malignant nodules. ADC values has obvious advantages than FA in the further classification.]]></description>
<pubDate>Fri,20 May 2016 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[The diagnostic ability of T2WI combined with diffusion weighted imaging and dynamic contrast-enhanced MRI for prostate cancer detection using 3.0 T MR scanner]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.05.004</link>
<description><![CDATA[Objective:  To evaluate the diagnostic ability of T2-weighted imaging (T2WI) combined with diffusion weighted imaging (DWI) and dynamic contrast-enhanced MRI (DCE-MRI) for prostate cancer detection using 3.0 T MR scanner. Materials and Methods:  Seventy-five prostate diseases patients pathologically proved underwent MRI examinations, including 40 patients with prostate cancer and 35 patients with non-prostate cancer. All patients were performed traditional MRI (T2WI) and functional MRI (DWI and DCE-MRI). The data obtained from T2WI, T2WI and DWI, T2WI and DCE and a combination of T2WI, DWI and DCE were scored and compared with pathological findings. Specificities, sensitivities and accuracies of the four protocols to diagnose PCa were evaluated. Results:  The sensitivity and accuracy of four methods to prostate cancer diagnostic showed statistical significance (Q=15.391, 15.61, respectively. P<0.01). Pairwise comparison of sensitivity and accuracy between four methods, there was significant differences between T2WI and T2WI+DWI+DCE, T2WI+DCE and T2WI+DWI+DCE (P＜0.05). Conclusions:  The combination of T2WI and DWI and DCE-MRI can improve the sensitivity and accuracy of prostate cancer detection, and be of high diagnostic value for prostate cancer. The diagnosis efficiency of T2WI+DWI was slightly worse than T2WI+DWI+DCE, when elderly patients were hard to be checked for a long time, it can be as conventional MRI sequences.]]></description>
<pubDate>Fri,20 May 2016 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[The diagnostic value of multiple b-value diffusion weighted imaging in prostate disease]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.05.005</link>
<description><![CDATA[Objective: To retrospectively evaluate the diagnostic value of multiple b-value diffusion weighted imaging in prostate disease of MRI. Materials and Methods: Ten healthy volunteers, 36 cases of prostatic hyperplasia (BPH) and 24 cases of prostate cancer (PCa) which pathologically confirmed were included in this study. ADC values were measured at b-value of 200, 400, 600, 800 and 1000 s/mm2 respectively. The quantitative comparison was applied between these groups. Results: With the increase of b value, the ADC value of PCa decreased gradually. However, in BPH patients, the ADC values did not show a significant change. The difference of the b-values of prostate cancer, prostatic hyperplasia and normal prostate tissue had statistical difference between groups. Conclusions: The ADC values of different b-values measured by DWI could help to differentiate between prostatic hyperplasia, prostate cancer and normal prostate.]]></description>
<pubDate>Fri,20 May 2016 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[The correlation between iron deposition of deep gray nuclei and cerebral venous susceptibility of drainage veins in healthy people using susceptibility mapping]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.05.006</link>
<description><![CDATA[Objective: To evaluate age-related changes of cerebral venous susceptibility and the relationship between iron deposition of deep gray nuclei and the susceptibility of cerebral drainage veins in healthy people using MR quantitative susceptibility mapping (QSM). Materials and Methods: Fifty-seven right-handed healthy individuals underwent SWI scanning to get phase images and magnitude images. QSM were reconstructed from the phase images and magnitude images using SMART software. The regions of interest include the bilateral cerebral veins (thalamostriate veins, septal veins, internal cerebral veins, basal veins) and the bilateral gray nuclei (caudate nucleus, globus pallidus, putamen, dorsal thalamus, substantia nigra, red nucleus) were drawn manually, and the susceptibility of cerebral gray nuclei and cerebral draining veins was measured using SPIN software. Results: There was no significant difference in susceptibility between the right and the left draining veins of cerebral gray nuclei in 57 healthy individuals (P>0.05). The susceptibility of right caudate nucleus, substantia nigra, red nucleus was higher than that of left sides (t value was 3.34, 5.12, 3.91, P<0.05). There was positive correlation between age and the susceptibility of right thalamostriate vein (r=0.33, P<0.05). There were positive correlation of susceptibility between left caudate nucleus and left internal cerebral vein, left putamen and left internal cerebral vein, red nucleus and left internal cerebral vein (r value was 0.29, 0.31, 0.28, P<0.05). Conclusions: The susceptibility of right thalamostriate vein increased with aging.There was no side-difference in susceptibility between bilateral cerebral veins. The susceptibility of some draining veins has positive correlation with iron deposition of some gray nuclei.]]></description>
<pubDate>Fri,20 May 2016 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Metabolic assessment of Parkinson disease by magnetic resonance spectroscopy]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.05.007</link>
<description><![CDATA[Objective: To evaluate the brain metabolite with Parkinson's disease (PD) by proton magnetic resonance spectroscopy (1HMRS). Materials and Methods: Forty-two PD individuals and twenty healthy controls were enrolled in this study. All the subjects were tested with unified Parkinson disease rating scale (UPDRS) scale. Subsequently, individuals underwent MRI and 1HMRS using a GE signa 1.5 T MR, and the ratios of metabolites in the substantia nigra, globus pallidus, prefrontal lobe, hippocampus, cuneus gyrus and dorsal thalamus were compared. Correlations, between brain metabolism with UPDRS the duration, in PD, were analyzed. Results: Significant remarkable declines in the NAA/Cr and NAA/Cho ratios in the bilateral substantia nigra, bilateral globus pallidus, bilateral prefrontal lobe, bilateral hippocampus, bilateral cuneus gyrus, and bilateral dorsal thalamus were found in the PD group (P<0.01). A significant increase of the Cho/Cr ratio in the right hippocampus, right cuneus gyrus, and right dorsal thalamus was also found (P<0.05). The NAA/Cho ratio in the bilateral substantia nigra (left r=–0.324, P=0.036, right r=–0.399, P=0.009), right globus pallidus (r=–0.353, P=0.022), left hippocampus (r=–0.388, P=0.011) and left cuneus gyrus (r=–0.325, P=0.036) were negatively associated with UPDRS scores (P<0.05). The NAA/Cr ratio in the left globus pallidus was positively associated with the duration (r=0.327, P=0.034). Conclusions: PD patients with extensive neuronal damage in the brain and some glial proliferation, the degree of damage is positively correlated with the clinical severity of the disease and gradually increased with the extension of the course of the disease.]]></description>
<pubDate>Fri,20 May 2016 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[The application of magnetic resonance spectroscopic imaging in thrombolytic therapy of hyperacute cerebral infarction]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.05.008</link>
<description><![CDATA[Objective: To investigate the application value of proton magnetic resonance spectroscopy (1H-MRS) in thrombolytic therapy of hyperacute cerebral infarction. Materials and Methods: According to the clinical treatment, patients with acute cerebral infarction were divided into thrombolysis group and non thrombolysis group. The two groups underwent conventional magnetic resonance (MRI) and 1H-MRS scans. Then we respectively compared the difference between the concentrations of Cr, Cho, NAA, the ratio of NAA/Cr, Cho/Cr, NAA/Cho in the infraction center, the border region, the normal region around the lesion and the contralateral area. Results:(1) In the thrombolysis group and non-thrombolysis group, the concentrations of Cr, Cho, NAA in the infraction center, the border region, the normal region around the lesion were significantly lower than the contralateral area (P<0.05), Lac increases compared with the contralateral area. (2) In the thrombolysis group, the concentrations of Cr and ratio of NAA/Cho in the infraction center and the border region were significantly lower than the non thrombolysis group (P<0.05), the concentrations of Lac and ratio of Lac/Cr in the border region were significantly lower than the non thrombolysis group (P<0.05). (3) In the thrombolysis group, the NAA, NAA/Cho in the infraction center were significantly negatively correlated with NIHSS score, the Lac in the infraction center was significantly positively correlated with NIHSS score. In the non-thrombolysis group, the Lac in the infraction center was also significantly positively correlated with NIHSS score. Conclusions: Multivoxel 1H-MRS can directly, accurately and comprehensively detect the recovery of cerebral injured neurons after thrombolytic therapy of cerebral infarction, it can objectively evaluate prognosis of cerebral infarction and the effect of clinical treatment, providing a foundation for clinical application.]]></description>
<pubDate>Fri,20 May 2016 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[1H magnetic resonance spectroscopy studies on subclinical neurocysticercosis]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.05.009</link>
<description><![CDATA[Objective: To evaluate the clinical application of single voxel 1H magnetic resonance spectroscopy in diagnosis of subclinical neurocysticercosis. Materials and Methods: One hundred and ten cases of subclinical neurocysticercosis and 130 cases of cerebral cysticercosis (live worms stage) with contrast enhanced single voxel 1H magnetic resonance spectroscopy were screened for this study. Observation of the change in ratio of the lesions of the subclinical neurocysticercosis and some trace metabolites around the lesions was done. Results: The group of subclinical neurocysticercosis has no significant difference with normal control group in various biochemical metabolites. The ratios of NAA/Cho, Cho/Cr and Lip/Cr have statistical significance in the analysis and evaluation of subclinical neurocysticercosis group and live worms stage group. The ratio of NAA/Cho in subclinical neurocysticercosis group is higher than live worms stage group. The ratios of Cho/Cr and Lip/Cr of the former are lower than that of the latter. The ratios of NAA/Cho and Lip/Cr evaluate the differential diagnosis efficiency between subclinical neurocysticercosis stage and live worms stage on ROC curve. Conclusions: 1H-MRS reveals the changes in characteristics of subclinical neurocysticercosis stage and live worms stage so as to evaluate the corresponding diagnosis index of the ratios of NAA/Cho and Lip/Cr, which are of great value to early diagnosis and treatment of the neurocysticercosis.]]></description>
<pubDate>Fri,20 May 2016 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[MRI features and diagnostic value of spinal tuberculosis]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.05.010</link>
<description><![CDATA[Objective: To explore MRI characteristics and diagnostic value of spinal tuberculosis. Material and Methods: Sixty-seven cases of patients previously diagnosed with spinal tuberculosis in our hospital were selected as TB group, 40 patients who have spinal disease with non-tuberculous were selected as control group, the X-ray, CT, MRI imaging data of the two groups were analyzed respectively to explore the MRI characteristics and diagnostic value of spinal tuberculosis. Results: Sixty-seven patients involved a total of 162 vertebrae, among which 30 patients involved with lumbar spine cases (44.77%), involving 80 lumbar vertebrae (49.38%), among the 162 vertebral body involvement, MRI showed bone destruction in 62 cases (92.54%), abscess formation in 57 cases (85.07%), endplate damage in 52 cases (77.61%). The detection rate of MRI in bone destruction, disc involvement is 100%. In bone destruction, endplate damage, disc involvement, abscess formation, spinal involvement and sequestration, the detection rate of MRI is significantly higher than the X-ray, CT (P <0.05), MRI detection rate of calcification is lower than CT detection rate (P<0.05). The sensitivity of MRI in diagnosing spinal tuberculosis is 92.54%, the specificity is 87.50%. The sensitivity of CT in diagnosing spinal tuberculosis is 68.66%, the specificity is 82.50%. The sensitivity of X-ray in diagnosing spinal tuberculosis is 47.76% and the specificity is 70.00%. Conclusions: The detection rate of MRI in diagnosing the early characteristics of spinal tuberculosis is higher, which is significantly better than X-ray and CT in diagnosing patients with spinal tuberculosis.]]></description>
<pubDate>Fri,20 May 2016 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Analysis on the magnetic resonance imaging features of gouty arthritis of the knee]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.05.011</link>
<description><![CDATA[Objective: To analyse the MRI features of gouty arthritis of the knee and discuss its diagnosis value. Materials and Methods: Twenty-one cases with gouty arthritis of the knee underwent knee MRI plain scan. MRI findings were retrospectively reviewed. Results: All of the 21 cases showed synovial thickness, hydrarthrosis, and soft tissue swelling. Twelve patients had the bone erosion which located at the femoral condyle, tibial plateau, patella, fibular head and showed hypointensity on T1WI and hyperintensity on T2WI. Bone edema was seen in 3. Eleven cases had the gouty tophus which located at the patella bursa, patellar fat pad, joint cavity, intercondylar fossa, femoral condyle or surrounding, patella or before, and tibial platform or before. The gouty tophus displayed as acicular, strip, nodosity or mass. Magnetic resonance signals had no specificity. Gouty tophus showed hypointensity (n=4), iso-/hypo- intensity (n=7) on T1WI, hypointensity (n=2), slight hyperintensity (n=5), and hypo-/slight hyper-intensity (n=4) on T2WI. Conclusions: To the early stage of gout arthritis of the knee, MRI can sensitively observe synovial thickeness, hydrarthrosis and soft tissue swelling, but no specificity. However, diagnostic specificity of MRI for the knee arthritis associated with the bone erosion and the gouty tophi is high.]]></description>
<pubDate>Fri,20 May 2016 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[MRI diagnosis of complete hydatidiform mole in early pregnance]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.05.012</link>
<description><![CDATA[Objective: To investigate the MRI imaging features and diagnostic points of complete hydatidiform mole in the early stage of pregnancy. Materials and Methods: The clinical and MRI imaging data of 9 cases of complete hydatidiform mole confirmed by pathology were retrospectively analyzed, the diagnostic and differentiate points were summarized. Results: There are some common features of hydatidiform mole on MRI. All of the 9 cases showed enlargement of the uterus, thickness of the uterus wall and appeared abnormal enlarged and tortuous vessels in the uterus wall and around the uterus, which was markedly heterogeneous enhanced after contrast medium administrated. There appeared patchy abnormal signals in the uterine cavity, which showed iso- or hypo-intensity on T1WI and inhomogeneous hyper- or hypo-intensity on T2WI, and showed slight enhancement after injection of contrast medium. All the low-intensity endometrium was integrated. During the follow up visits after uterine aspiration in clinic, the HCG value gradually decreased in all cases, and the abnormal vessels in the uterus wall as well as adjacent spaces also shrinked or diminished. Conclusions: There are some specific imaging features of hydatidiform mole on MRI. The diagnosis of hydatidiform should take full consideration of the clinic history.]]></description>
<pubDate>Fri,20 May 2016 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[The relevant research and latest developments of crossed cerebellar diaschisis]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.05.015</link>
<description><![CDATA[Crossed cerebellar diaschisis refers to the decline of blood flow and oxygen metabolism rate of contralateral cerebellar brain tissue after the cerebral ischemia. Thereafter cerebral metabolic rate of oxygen, cerebral glucose metabolic rate and other technologies continue to be applied to in-depth study of this phenomenon. With the application of advanced research methods and imaging technology, the further progress has been made of the mechanism and development in this field. This paper will review and discuss the mechanism and research progress of crossed cerebellar diaschisis in the relevant disease and imaging.]]></description>
<pubDate>Fri,20 May 2016 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Cognitive impairment in type 2 diabetes mellitus and its neuroimaging]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.05.016</link>
<description><![CDATA[Type 2 diabetes mellitus (T2DM), which is the independent risk factor of mild cognitive impairment, dementia, and stroke, affects the function of central nervous system significantly. Cognitive impairment may exist firstly. The study of its mechanism and early prevention plays an important role in the comprehensive treatment of diabetes. The mechanism is intricate involving vascular, nerve, function, etc. Functional magnetic resonance imaging explores the characteristics of diabetes cognitive impairment in various aspects. It combines the pathology and clinical presentation in order to make an early diagnosis and prevent the disease from progression. In this article, we present a review focusing on the mechanism of diabetes cognitive impairment and its neuroimaging.]]></description>
<pubDate>Fri,20 May 2016 00:00:00  GMT</pubDate>
</item>
</channel>
</rss>
