Diagnostic value of T2-weighted gradient-echo for diagnosis of cerebral venous thrombosis

The role of MRI has been increased for diagnosis of cerebral venous thrombosis during recent years. In this study the efficacy of T2 Gradient echo for diagnosing cerebral thrombosis has been assessed. This study was a descriptive-analytical study, which was focused on diagnostic values. Diagnostic value T2 GRE sequence of MRI is being evaluated and compared with common sequences of T1, T2, and FLAIR. Then, via Golden Standard of MR Venography, different sequences of MRI have been compared. Gathered data had been entered in SPSS software and through using descriptive statistical methods and data frequency, different sequence sensitivities were computed. Twenty one patients, including three males [14.3%] and 18 females [85.7%] with the average age of 36.00 +/- 10.13 participated in this study, and they have had a total number of 55 numbers of thrombosis. The most common clinical symptom, predisposing factor, involved sinus, and common underlying disorder was headache [95.2%], taking OCP [52.4%], superior sagittal sinus [71.4%], and infraction [47.6%] respectively. The sensitivity rates of T1, T2, and T2GRE sequence for diagnosis of acute thrombosis were 30%, 0, and 90% respectively, and for Early Sub-Acute cases they were 92.9%, 92.9%, and 100% respectively. T2 GRE sequence can be used as a quick diagnostic tool for diagnosing CVT before applying MR venography in patients. Using this sequence can be very effective, especially when it is critical to diagnose the disease quickly

[Diagnostic value of PD- fat suppression and T2 gradient echo MRI sequences in diagnosis of cruciate ligament and meniscal lesions]

Knee MRI has drawn attention due to its non-invasiveness and its high accuracy. Few reports about the accuracy of PDFS sequences for diagnosis of injured menisci and cruciate ligaments have been published. This study was performed to compare the diagnostic value of proton density with fat suppression [PDFS] and T2 gradient echo [T2 GRE] MRI sequences in injured menisci and cruciate ligaments of knee. This was a descriptive and analytical study. The sample size included 100 cases. In this study the diagnostic value of MRI with PDFS sequence and common methods [T2 GRE] evaluated and compared with each other. Considering the arthroscopy results as a gold standard, the sensitivity, specificity, positive predictive value [PPV], negative predictive value [NPV] and accuracy of the different sequences were calculated. This study included 100 patients; 79 males [79%] and 21 females [21] with a mean age of 27.8 +/- 9.04 years. Sensitivity, specificity, PPV,NPV and accuracy of sequences for detection of medial meniscal tear were 96.05%, 95.83%, 98.64%, 88.46% and 96% respectively, and for lateral meniscal tear was 90%, 100%, 100%, 100% and 97%. All the above mentioned parameters in ACL tears were 100%. PDFS sequence can be used in the evaluation of knee injuries as a reliable part of the knee imaging protocol and can be a good alternative for the nonfat-suppressive sequences in these patients

[Incidence rate of cerebral venous thrombosis and its related factors in Kermanshah city in 2009-2010]

Cerebral venous thrombosis [CVT] is a rare disorder. Incidence of CVT in developing countries is not clear. This study was conducted to determine the incidence rate of cerebral venous thrombosis, its symptoms and some of its predisposing factors in Kermanshah city. This was a descriptive study. The sample size included 21 cases. Diagnosis of cases of CVT was based on MRI sequences T1, T2, FLAIR and approved by the gold standard MR venography over 12 months. The data were introduced into SPSS software and analyzed by means of descriptive statistics and the frequency of data was calculated. This study included 21 patients; three males [14.3%] and 18 females [85.7%] with a mean age of 36.00 +/- 10.13 years who had a total number of 55 thromboses. The most prevalent clinical symptoms, predisposing factor, associated disorder, and sinus involved, included headache [95.2%], OCP consumption [52.4%], infarction [47.6%] and superior sagital sinus [71.4%] respectively. This study showed that the incidence of cerebral venous thrombosis in Kermanshah is relatively higher in comparison to the statistics mentioned in other studies, so further studies for more evaluation of contributing factors in this disease are recommended