Objective To study the diagnostic value of imageology(CR,CT and MRI) for sacraoiliac pathological changes(SIPC) in ankylosing spondylitis(AS).Methods A retrospective analysis was made on the manifestations of CR,CT and MRI of the sacraoiliac joints in 98 cases of clinically-proved AS,including the grading,site and number,calcification,joint-space and sub-articular-surface-bone changes.Results The characteristics of AS in sacraoiliac joint on CR were: joint-space narrowing(67),articular-surface sclerosis(22),cystic change(15) and joint stiffness(17) and calcification(38).CT features were:the lesions involving iliac-side synovium of the sacraoiliac joint mainly,chondral calcification(55),joint-space narrowing(42),cystic change(43) and sclerosis(65) of the articular surface and sub-surface bone structure,and calcification of sacraoiliac-ligament(52).MRI showed: articular-cartilage damage(40),edema around the lesion(57) and intrabony fat sedimentation(15).Conclusion For sacraoiliac joint in AS,CR examination is the basic imaging method,CT in grading lesions is more accurate,while SIPC in AS can be early diagnosed by MRI.

Objective To explore the safety, therapeutic-effect-evaluating standards and clinical value of the interventional treatment used as preoperative chemotherapeutic embolism of pelvic tumors and palliative treatment of the patient unsuitable for surgery. Methods Twenty-nine cases of pelvic tumors with complete materials were selected from the cases treated by Seldinger’s interventional techniques from March 1997 to March 2002 and comprehensively analyzed. Results After the chemotherapeutic embolism, most of the arterial supply to the tumors were blocked off; the tumor stains were decreased by more than 75 %; the intra-operating bleeding ranged from 820 to 1530 ml and averaged 1220 ml; the surgical removals were successful. The pathological examinations of the postoperative specimens showed that the necrostic rate of tumor ranged 91%～98%; the remission rate of painful symptoms reached 100%. No severe complications were found in this series.Conclusion The interventional treatment of pelvic tumors is safe, reliable and simple in operation, and can reduce the intra-operative bleeding and improve the successful rate of the surgery. It is regarded not only as the effective auxiliary therapy before surgical removal, but also as the first-selected method for the palliative treatment of the patient unsuitable for the surgery.

Objective To explore the value of imaging diagnosis of nerve-root-type cervical spondylosis(NRTCS)and to study the relative factors to the nerve root disturbance.Methods 188 cases of NRTCS clinically proved and with complete imaging data were retrospectively analyzed.The imaging characteristics of CR,CT and MRI of NRTCS were compared and the relative factors to the nerve root disturbance were analyzed in combination with the clinical characteristics.Results ①CR films in six-position could show the whole expression of the cervical spine.The anterior-posterior and functional position CR showed the physiological curvature change in 122(64.9%),narrowing of intervertebral space in 96(51.2%)and vertebral-body unstability or slide in 49(26.1%).The oblique CR showed the intervertebral-foramen lessening or narrowing in(26.1%)and Luschka-or intervertebral-joint osteophyte in 82(43.2%);②CT scans showed Luschka-or intervertebral-joint osteophyte in 76(40.4%),disc herniation and calcification of cartilage nodus in 80(42.6%)and hypertrophy or calcification of ligamenlum flavum in 66(39.8%);③MRI showed intervertebral-disk degeneration and protrusion in 105(55.8%),hypertrophy or calcification of ligamentum flavum in 51(27.1%),the nerve root and spinal cord compressed in 69(36.7%)and edema or degeneration of spinal cord in 23(12.2%).Conclusion The nerve root disturbance is closely correlated with the imaging appearances in NRTCS.It is of importance in early diagnosis and treatment for NRTCS to analyse synthetically the imaging data and clinical characteristics.

Objective To study MR imaging diagnostic value of brain-stem cavernous angioma(BCA).Methods 9 cases of BCA proved both surgically and pathologically with integrated clinical,MRI and pathological data were analyzed.Results The clinical attacks were divided into two types:the sudden and the resting.The MRI findings of BCA included:isointensity or hypointensity on T1WI(76.5%),isointensity or hyperintensity on T2WI(85.3%),heterogeneous mixed signal intensity on both T1WI and T2WI (36.2%),hypointense ring round angioma on T2WI (16.2%).On Gd-DTPA scanning,the lesions were slight enhancement or no enhancement in 8 cases.The shapes of lesions were round-like in most cases(86.6%),and typical moruloid or network in some cases(11.7%).The lesions localized in the midbrain in 3 cases,in the pons in 4,and in the medulla oblongata in 2.The histopathological findings included:composite pathological changes in most cades,elastic fibers in the angiomatous lacuna vasorum in 3 cases,visible drainage vein and supply artery in 2 cases.MRA showed hyperintensity around the angiomas in 5 cases.Conclusion MR imaging is of significant value in diagnosing BCA.