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Objective To explore the application value of multislice spiral CT in typical renal angiomyolipoma. Methods A retrospective analysis of clinical and imaging data of 24 patients with classic type renal angiomyolipoma diagnosed by CT. Results Of all the 24 patients,5 patients were male,19 patients were female. Single lesion in 19 cases, multi-ple lesions within the single kidney in 2 cases, each kidney had a lesion in 1 case, multiple lesions in the both kid-neys in 2 cases. The numbers in the multiple lesions5~13. The lesions were round,oval or irregular in shape, 14 le-sions in 8 cases were protruding from the renal capsule outline, the residual lesions were located in the renal parenchyma.Size0.4 cmí0.3 cm~6.7 cmí5.9 cm. Unenhanced CT showed the lesions were rich in fat(CT value-106 HU~-10 HU),and more with streaks and soft tissue density. 3 cases underwent enhanced CT,which showed heteroge-neous enhancemen in the substantive component of the lesions. Conclusion CT is easy to demonstrate gross fat within the angiomyolipoma,and can be used for regular imaging follow-up and preoperative evaluation.
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Objective To investigate the MRI findings of displaced bucket-handle tear in medial meniscus. Methods From April 2011 to August 2015 in our hospital, the clinic and MRI data of 12 patients with displaced bucket-handle tear in medial meniscus confirmed by arthroscopy were retrospectively analyzed. Results 12 cases were unilateral. Fragment shift sign, double posterior cruciate ligament sign, flipped meniscus sign and double meniscus forefoot sign, abnormal circumferential meniscus sign, bow tie broken sign and disproportional posterior horn sign could be seen in all cases. Conclusion Displaced bucket-handle tear in medial meniscus has some characteristic manifestations on MRI, MRI can be used as a preferred imaging methods for displaced bucket-handle tear in medial meniscus.
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Objective To investigate the diagnostic value of MRI in chronic completely tear of the anterior cruciate lig-ament(ACL). Methods From January 2013 to September 2015 in our hospital,the clinic and MRI data of 20 cases with chronic completely tear of the ACL proved by arthroscopy. Results The diagnostic accuracy rate of MRI was 75%(15/20), and 25%(5/20) was misdiagnosed as partial tear.The MRI signs were: ACL ligament direction (n=20, 100%), abnormal ACL increased signal (14 cases, 70%), tibia forward (n=19, 95%), abnormal deeper lateral femoral notch or bone contusion or cartilage erosion(n=20, 100%), smaller bending angle index of posterior cruciate ligament(n=20, 100%), with the medial meniscus injury(n=18, 90%). MRI also clearly showed other lesions in the knee joint. Conclu-sion MRI has high diagnostic accuracy in chronic completely tear of the ACL, so which is worthy of application.
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To optimize the configuration of the conventional SE and FSE sequence parameters in low field MRI. With the combination of larger vision, relatively thinner slice thickness, small number of excitation (NEX = 1 or 2), the signal-to-noise ration and the spatial resolution on follow-up images are moderate, the scan time is significantly shorter along with fewer motion artifacts, the check success rate is improved.
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Equipment Design , Magnetic Resonance Imaging , MethodsABSTRACT
Objective To explore CT and HRCT manifestations of Swyer-James syndrome(SJS).Methods CT and HRCT were performed in 19 patients,3 of them underwent inspiratory and expiratory HRCT,1 patient surgically proved with bronchiolitis obliterans and bronchiectasis.Results CT demonstrated 37 lobes were involved appearing as hyperlucent and with decreased vascularity ,the volume of lobes decreased in 35(95%) ; CT showed 19 patients with brochiectasis , 2 patients with pulmonary tuberculosis , 6 patients with brochiolitis , and 3 with segmental atelectasis.Conclusion CT and HRCT are very useful for the diagnosis of SJS.