<?xml version="1.0" encoding="utf-8" ?>
<rss version="2.0">
<channel>
<title>Chinese Journal of Magnetic Resonance Imaging RSS feed</title>
<link>http://med-sci.cn/cgzcx/en/contents_list.asp?issue=201512</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
<item>
<title><![CDATA[Principle and application of hyperpolarized magnetic resonance spectroscopy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.12.001</link>
<description><![CDATA[The polarization of nuclear spins can be enhanced above the thermal equilibrium polarization with dynamic nuclear polarization (DNP) to achieve signal-noise ratio improvement of greater than 10,000-fold in magnetic resonance, this technique is denoted "hyperpolarization"(HP). Dissolution DNP is allowed the enhanced sample to be transferred from the polarizer and injected in vivo, providing realtime measurement of perfusion, metabolite transport, and metabolism, which break the constraint of traditional magnetic resonance in detecting cellular metabolism in real time in vivo. The definition and introduction to the DNP technique, hyperpolarized bio-probes and applications, and analysis and interpretation of results from magnetic resonance images/spectroscope in pre-clinical and clinical areas were reviewed.]]></description>
<pubDate>Sun,20 Dec 2015 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Altered gray matter volume in primary trigeminal neuralgia: a voxel based morphometry MRI study]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.12.002</link>
<description><![CDATA[Objective: To detect whether there is gray matter volume (GMV) alteration and further analyze the involvement of central nervous system in pain processing in trigeminal neuralgia patients. Materials and Methods: Nineteen patients diagnosed with trigeminal neuralgia and twenty-two age-matched, sex-matched normal volunteers as controls were recruited. T1-weighted 3D BRAVO sagittal images were obtained from all subjects. Voxel based morphometry(VBM) was used to identify GMV differences between patients and normal controls. The correlation between altered GMVs and disease duration as well as altered GMVs and pain intensity were also analyzed in trigeminal neuralgia patients.  Results: Compared with normal controls, patients with trigeminal neuralgia had decreased GMV in left anterior cingulate as well as increased GMVs in right superior frontal gyrus, right insula, right putamen and bilateral cerebellum. Otherwise, we found a negative correlation between pain duration and altered GMV of the left anterior cingulate which is an important region for the development and maintenance of pain in trigeminal neuralgia.  Conclusion: The altered GMV in central nervous system and the negative correlation between disease duration and altered GMV of the anterior cingulate may suggest that these central brain regions are extremely important for the development and maintenance of pain in trigeminal neuralgia, which reveals that exploring the central mechanisms of pain processing in trigeminal neuralgia may benefit new therapeutic methods in the future.]]></description>
<pubDate>Sun,20 Dec 2015 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[The MRI features of ischemic lesions of adult moyamoya disease patients in different stage]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.12.003</link>
<description><![CDATA[Objective: To analyze the MRI features of adult moyamoya patients in different stage and possible pathogenesis.  Materials and Methods: We retrospectively reviewed the topography of ischemic lesions in 174 cerebral hemispheres of 94 adult patients with moyamoya disease, CVA score were calculated and its correlation with DSA findings were compared.  Results: Using the results of DSA as reference, there were 6, 26, 23, 50, 49, 20 cerebral hemispheres in stages I to VI respectively among all 174 cerebral hemispheres. Ischemic lesions were detected in 156 hemispheres: 114 hemispheres only effect sub-cortical structure and 42 hemispheres has cortical areas been involved. There are 145 hemispheres that have lesions located in anterior circulation and 11 hemispheres has lesions in posterior circulation areas. The number of hemispheres whose CVA score is 0-3 are 18, 74, 40, 42 respectively. Along with the increase of stages diagnosed by DSA, the lesions growth from sub-cortical area to cortical area(r=0.32859, P＜0.0001), while the CVA score increased as well(r=0.30375, P＜0.0001). Conclusion: The location and size of ischemic lesions in patients with moyamoya disease changes along with the progress of DSA grade, which would be helpful to early diagnosis and condition evaluation.]]></description>
<pubDate>Sun,20 Dec 2015 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Quantitative evaluation of hemodynamics changes in childhood moyamoya disease after revascularization surgery using perfusion-weighted MR imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.12.004</link>
<description><![CDATA[Objective: To evaluate whether Perfusion-Weighted Imaging (PWI) can depict hemodynamic status and its relationship with Digital Subtraction Angiography (DSA) and whether changes in PWI imaging after revascularization surgery are correlated with clinical outcomes in childhood moyamoya disease.  Materials and Methods: Pre- and postoperative PWI imaging data in 16 children with moyamoya disease (mean age, 9.88 years; range, 5-15 years) were included, which involved regional Time To Peak (rTTP), regional Cerebral Blood Volume (rCBV), regional Cerebral Blood Flow (rCBF) and regional Mean Transit Time (rMTT). Suzuki stages on each side of the brain hemisphere were evaluated by the DSA results. Pre- and postoperative PWI parameters were compared by using a paired t test; relationships between PWI parameters and clinical outcomes were investigated by using independent-samples t test; relationships between PWI parameters and Sukuzi Stages were investigated by using Spearman correlation analysis, with a significance level of 0.05. Results:  At early stage of MMD, Suzuki stages were correlated with blood perfusion change. However, no correlation was demonstrated when suzuki stages ＞ II.  rTTP decreased significantly after revascularization surgery. Change in rTTP was significantly different in the clinical outcome groups. Conclusion: MR-PWI can quantitatively depict hemodynamic status and evaluate hemodynamic changes after revascularization surgery in moyamoya disease.]]></description>
<pubDate>Sun,20 Dec 2015 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Correlative study of clinical-imageological in infantile acute cerebellar ataxia after infection]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.12.005</link>
<description><![CDATA[Objective: To investigate the magnetic resonance imaging (MRI) manifestation of infantile acute cerebellar ataxia after infection, and study the correlation of clinic-imageologic. Materials and Methods: The clinical data and imaging manifestation of 30 infant with acute cerebellar ataxia after infection were analyzed retrospectively. Results: The lesion shows hyperintensity signal on T2WI in cerebellar dentate nucleus in all patients. Eighteen cases were cerebellar dentate nucleus lesions, and the long T2 signal was showed in the bridge on the back and sides of the brain-the cerebellum on foot-pulp sail, cerebral peduncle, medulla oblongata, cervical spinaland basal ganglia. Among them, the lesion on the cerebellar dentate nuclei is characteristic, comparing with other parts of the incidence, the difference between groups was significant(P＜0.05). If the time span from showing cerebellar symptoms to the preliminary MRI investigation less than 3 days, children had severe clinical symptoms and the lesions wide-ranging, other sites were also involved; The symptoms were improved and the lesions of dentate nucleus range narrow between 3 and 5 days; The children's clinical symptoms improved significantly and the lesions of dentate nucleus disappeared or retracted to the side of the fourth ventricle between 6 and 9 days; The lesions wae disappeared when the time span was more than 9 days, the clinical symptoms of the children were cured or improved significantly. In general, it is positive correlation of clinical-imageological, compared with clinical symptoms, the lesions disappeared faster.  Conclusion: There are characteristic imaging manifestations in infantile acute cerebellar ataxia after infection. MRI has an advantage of detecting lesions, also can provide useful information for clinical diagnosis and prognosis.]]></description>
<pubDate>Sun,20 Dec 2015 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[The relevant risk factors for analyzing the occurrence and distribution of cerebral microbleedsin old patients with transient ischemic attack]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.12.006</link>
<description><![CDATA[Objective: To investigate the relevant risk factors for analyzing the occurrence and distribution of cerebral microbleeds(CMB) in old patients with transient ischemic attack(TIA). Materials and Methods: One hundred and eighty-two old patients with TIA diagnosed by physician were collected from September 2013 to July 2015 in our hospital, whose clinical data and MRI data were analyzed by two neurologists and two radiologists respectively. Clinical data included age, gender, clinical symptoms, diagnosis, confounding diseases, IADL score and biochemical test results(such as triglyceride(TG)and high-density lipoprotein(HDL)). MRI data contained the location and distribution of CMB, the degree of lacunar infarction(LI), periventricularhighsignal(PVH) and deep white matter hyperintensities(DWMH). Then the relative risk factors were analysis for the occurrence and distribution of CMB in old patients with TIA.  Results: In comparison with CMB(-)group, there were higher age, LI amount, PVH and DWMH grading and lower HDL in CMB(+) group, which had statistical significance(P＜0.05), but IADL score was not statistical significance(P＞0.05) in both groups. For the distribution of CMB, there were higher LI and DWMH in diffuse type than cerebral lobe and deep structure type, which had statistical significance(P＜0.05). but HDL level was not statistical significance(P＞0.05)  among three type groups. The relative risk factors were serious PVH and high TG for cerebral lobe type(OR=7.01)and deep structure type(OR=6.80)respectively, and were serious DWMH and LI amount for diffuse type(OR=9.4; OR= 7.88). Conclusion: The occurrence and distribution of CMB in old patients with TIA are related to age, LI amount, TG, PVH and DWMH grading, which are helpful to the diagnosis and treatment for CMB patients.]]></description>
<pubDate>Sun,20 Dec 2015 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Comparison of imaging and pathological findings of intracranial hemangiopericytoma and solitary fibrous tumour]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.12.007</link>
<description><![CDATA[Objective: To compare and analyze imaging features of intracranial hemangiopericytoma(HPC) and Solitary fibrous tumour(SFT). Materials and Methods: Eighteen patients of HPC and 10 patients of SFT proved by operation and pathology were analyzed retrospectively. Both plain and enhanced MR scans were performed and the results were analyzed in all cases. Results: There were no significant difference between HPC and SFT in relation to the attachment of the dura mater, dural tail sign(P＞0.05). The difference between the two groups were significant difference, in relation to tumor shape, T2WI signal, necrotic and cystic areas and hemorrhage, peritumoral edema, skull destruction, enhancement(P＜0.05). Conclusion: Imaging findings of intracranial HPC and SFT are different, the former has mostly lobulated, irregular shape, iso-high signal on plain T2WI, cystic necrosis and hemorrhage more common, obvious peritumoral edema, visible skull destruction, significant enhancement; the latter is mostly round or oval, low signal area on plain T2WI, rare cystic and necrosis, hemorrhage, light peritumoral edema, no skull destruction,  significant enhancement with delayed enhancement.]]></description>
<pubDate>Sun,20 Dec 2015 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Application study of magnetic resonance neurography in imaging of peripheral nerve sheath tumor]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.12.008</link>
<description><![CDATA[Objective: To investigate the clinical value of magnetic resonance neurography (MRN) in diagnosis of peripheral nerve sheath tumors. Materials and Methods: Twenty-seven patients with peripheral nerve sheath tumors proved by surgery and pathology underwent MRI conventional scanning and contrast-enhanced short TI reverse recovery time sequence (3D- STIR) scanning. The accuracy and feasibility of contrast-enhanced 3D-STIR scanning in peripheral nerve sheath tumors were retrospectively analyzed and evaluated. The diagnostic signs and the value of MRI conventional scanning and contrast-enhanced 3D-STIR scanning were compared.  Results: In these cases, MRI conventional images can display the location, number, shape, size and signal characteristics of lesions, and contrast-enhanced 3D-STIR images can display the relevance between lesions and spinal nerves clearly.  Conclusion: MRI conventional scanning and contrast-enhanced 3D-STIR scanning have important clinical value in diagnosing peripheral nerve sheath tumors.]]></description>
<pubDate>Sun,20 Dec 2015 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[The pathophysiology changes and MR imaging features of high altitude heart disease in children]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.12.009</link>
<description><![CDATA[Objective: To study the MRI characteristics of high altitude heart disease (HAHD) in children. Materials and Methods: Eight patients with clinically diagnosed with HAHD who lived at an elevation between 3500-4500 m, aged 8-24 months were scanned by using 0.5 T MRI equipment with ECG-gated spin-echo technique, the horizontal axis, major and minor axes were scanned as the basic levels to measure the right ventricular’s anterior wall and left ventricular’s post wall in systolic and diastolic(RVAWs and RVAWd, LVPWs and LVPWd), interventricular septum in systolic and diastolic (IVSs and IVSd) in thickness, and the diameter of pulmonary artery diameter (PAD). The six normal children who live the same sea level were measured by the same technique. Results: MRI show: (1) Eight patients were shown right ventricular wall thickening which was greater than or equal to left ventricular wall, right ventricular cavity and right atrial cavity was expanding. RVAWs was (7.35±0.84) mm, RVAWd (5.31±1.05) mm. The control of RVAWs was (3.58±0.02) mm, RVAWd was (1.98±0.12) mm. (2) Eight patients’ LVPWs was (6.18 ±0.69) mm, LVPWd (4.08±0.83) mm, one case of children increased to left ventricular wall and interventricular septum thick thickening, LVAPWd 6 mm. The control of LVPWd was (3.68± 0.30) mm. (3) The ventricular septal straight or protrude, IVSs (4.74±1.29) mm, IVSd (3.45±0.89) mm. Septal thickening The IVSd is 5.6 mm. The control IVSd was (3.17±0.46) mm. (4) Eight patients’ pulmonary artery dilation(PAD) was (17.0±1.3) mm, which is expanded compared with control subjects. The control subjects PAD is (12.15±0.51) mm. Conclusion: Right ventricular hypertrophy and pulmonary expansion was the main plateau of high altitude heart disease, with minority was left ventricular hypertrophy and ventricular septal thickening.]]></description>
<pubDate>Sun,20 Dec 2015 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Magnetic resonance imaging and ultrasound in evaluation of microwave ablation therapy for breast benign nodules]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.12.010</link>
<description><![CDATA[Objective: To discuss the value of magnetic resonance imaging (MRI) and ultrasound (US) in assessing the efficacy of microwave ablation (MWA) therapy for breast benign nodules. Materials and Methods: Selected 20 patients with 41 benign breast nodules which was confirmed by pathology, before and after MWA therapy, performed US and MRI on those respectively. The following features of the nodule, such as location, number, longest diameter, boundary, internal echoic, etc were observed. Results: The longest diameter of nodules were (17.5±5.6) mm and (15.9±6.9) mm, respectively, they have statistical difference (t=2.752, P=0.012). Before MWA therapy, nodules were all hypoechoic with clearly boundary on gray-scale US, all nodules presented enhancement partly on both contrast-enhanced ultrasound (CEUS) and enhanced MRI imaging. After MWA therapy, therapic region of the nodules were hyperechoic with blur boundary, CEUS presented nodules as non-enhancement in 35 (85%) nodules and sparsely punctate enhancement in 6 nodules, which was undergone further MWA therapy. All nodules were non-enhanced with a area of edema beside the nodules on enhanced MRI. Internal region of the nodule was presented coagulative necrosis on pathology after MWA therapy.  Conclusion: MRI can contribute to understand the size, spatial structures and blood flow distribution and US can monitor and assess the process of MWA therapy, they play an important role in designing accurate strategy and evaluating long-term efficacy of MWA therapy.]]></description>
<pubDate>Sun,20 Dec 2015 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[MRI features of tumor like inflammatory demyelinating disease]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.12.011</link>
<description><![CDATA[Objective: To investigate the MRI features of the tumor like inflammatory disease in the brain. Materials and Methods: The MR imaging performances of tumor like inflammatory demyelinating disease in eight eases were retrospectively analyzed and their imaging features were summarized. Results: MRI showed localized mass lesions, and showed long T1, T2 signal lesions in eight cases. Enhancement scanning displayed varying degrees of enhancement, 2 cases showed complete ring-like enhancement, 4 cases showed incomplete opening of the ring-like enhancement, and 2 cases showed patchy enhancement; DWI phase was slightly high in early stage. 6 patients were treated with hormone conservative treatment for 4 weeks, the review of the lesions were reduced and did not have any obvious enhancement. 2 cases were surgical treated by preoperative misdiagnosis.  Conclusion: MRI examination of the tumor like inflammatory disease of the diagnosis has a certain characteristic, and MRI can monitor outcomes of lesions．]]></description>
<pubDate>Sun,20 Dec 2015 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[The feasibility of IDEAL-IQ quantitative evaluation of vertebral fat fraction content in rabbit models of diabetes mellitus]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.12.012</link>
<description><![CDATA[Objective: To use the IDEAL-IQ technique to estimate vertebral fat fraction(FF) in alloxan-induced diabetic rabbits.  Materials and Methods: Twelve young New Zealand white rabbits were randomly assigned to alloxan-induced diabetic group(n=6) and control group(n=6). The rabbits in alloxan-induced diabetic group were injected with a total amount of 100 mg/kg of alloxan. Both of the rabbits in alloxan-induced diabetic and control group underwent magnetic resonance imaging (TIWI, T2WI, IDEAL-IQ) at each time point(0, 4, 8, 12, 16 weeks). Each vertebral fat fraction was measured at a standard workstation (AW 4.6; GE Medical Systems). Region of interest (ROI) had a shape of rectangle and they were drawn manually. HE staining was performed. Results: Slight increase of the signal of the lumbar vertebral bodies was found at the T1WI and T2WI in the alloxan-induced diabetic group at the week of 16. Compared to the control group, the alloxan-induced diabetic group showed the reduce of bone cells and increase of the fat cells. The alloxan-induced diabetic group has statistically differences in vertebral fat fraction at each time point(F=50.387，P＜0.01). The control group has no statistical differences in vertebral fat fraction at each time point(F=1.477，P＞0.05). There is statistical difference in vertebral fat fraction between alloxan-induced diabetic and control group at the week of 16(t=-10.726, P＜0.05). A significant positive correlation is found between vertebral fat fraction and fat cell count(r=0.925, P＜0.05).  Conclusion: IDEAL-IQ technique can quantify the vertebral fat fraction in alloxan-induced diabetic rabbits.]]></description>
<pubDate>Sun,20 Dec 2015 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[The effects of chronic high altitude disease on cardiac structure and function and the application prospect of MR in cardiac changes]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.12.015</link>
<description><![CDATA[Chronic high altitude disease is a disease that feature is excessive increase in red blood cells and involving multi-system disease. Circulatory system is an important system which consists  of the heart and blood vessels. Heart has a unique importance as the power pumps of blood circulation. MR has broad application prospects and significance which can find the heart changes of CMS patients, with the advantages of high-resolution, non-invasive, repeatable, multi-parameter imaging and so on, so this paper reviews changes of cardiac pathophysiological and prospects in patients with CMS.]]></description>
<pubDate>Sun,20 Dec 2015 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Research progress on application of dynamic contrast enhanced-MRI in renal cell carcinoma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.12.016</link>
<description><![CDATA[Magnetic resonance imaging (MRI) has been applied in imaging of abdominal viscera increasingly. Dynamic contrast enhanced-MRI (DCE-MRI), a functional imaging technique, is gradually applied to kidney disease. Unenhanced MRI is better to show lesion morphology and composition which qualitative diagnosis of unenhanced MRI mainly depended on. DCE-MRI plays an important role to provide additional disease information based on regular MRI. In this paper, we reviewed the characteristics of unenhanced MRI in different types of renal cell carcinoma and its disadvantages, and described diagnosis and differential diagnosis of renal carcinoma by DCE-MRI qualitative analysis, semi-quantitative and quantitative analysis, and emphasized DCE-MRI principle, reprocessing and clinical application of renal cell carcinoma.]]></description>
<pubDate>Sun,20 Dec 2015 00:00:00  GMT</pubDate>
</item>
</channel>
</rss>
