Magnetic Resonance Imaging Study of Osteonecrosis in the Asymptomatic Hip

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(1)M Taiwan J Med 1998. 84. 8. 86. 7. 1 43-6. 54 10. (18.5%). 29. (53.7%). (. 27. 54. (Core decompression). 27 ). [1]. [2] Dr Ficat. [3]. 1). 2). (Heterogenicity) 3) Crescent sign without coll apse 4) Crescent 84. 8. 86. 7. 188. sign with collapse5). Philip Gyroscan 0.5 Tesla 1). superconductive MRI. T1WI (TR/TE 500 /20 msec) TE 2000 / 80msec ) /20 msec). T2WI (TR/. PDWI (TR /TE 2000 1). 2). 9/11/1997 10/24/1997. 9/30/1997.

(2) 44. 2 T1. MRI. Dr Mitechll [4]. 1)T1. 2) T1 T1. T2. T2. 3)T1. 100. T2. T2. %. 4). 10. (18.5%) ( Heterogeni-. 5) 16.7%. city ). 1 54. 42. (77.8%). (22.2%). (1.9%). 12. 43.8. 26. 76. 24. (44.4%). 7. 5. 70%[11]. (9.3%). 29. (13%) 18. (33.3 %). 1. (53.7% ). 7. 13.5. [12]. 19. (35.2%) 10 (Heterogenicity). 3 Hip [5]. -pocrates. [6 [8]. [9]. 7]. [10]. 24 18. 33.3% 7. 5. 44.4% 13%. 9.3%. 50%. 9.

(3) 45. (%). (%) (Heterogenicity). 9(16.7%). 32(59.3%). Crescent sign without collapse. 7 (13%). 0. Crescent sign with collapse. 13(24.1%). 0 1( 1.8%). 2 (3.7%). 44(81.5%). 0. 54. 54. (%) T1 T1 T1. 18(33.3%) 2( 3.7%). 1(1.9%). T2. 13(24.1%). 4(7.4%). T2. T1. (%). T2. T2. 24(44.4%). 21(38.9%). 0. 0. 25 (46.3%). 54. 54. findings. Radiology 1987;162: 709-15. 5. McCarty E :Aseptic necrosis of bone. A historical perspective. Clin Orthrop 1982;168:216-21. 6. Cushner FD, Friedman RJ : Osteonecrosis of the femoral head. Orthop Rev 1988;17 :29-34. 7. Frostick SP, Wallace WA :Osteonecrosis of the humera I head.Clin Rheumatol 1989;3:651-7. 8. Kelman GJ, Williams GW, Colwell CW Jr, et al : Steroidrelated osteonecrosis of the knee. Two case reports and 1. Hungerford DS, Lennox DW : The importance of intraosseous pressure in the development of osteonecrosis of the fem femoral head: implications for treatment. Orthop Clin North Am 1985 ; 16:635-52. 2. Markisz JA, Knowles JR, Altchek DW, et al : Segmental patterns of avascular necrosis of the femoral heads : early detection with MR imaging. Radiology 1987;162: 717-20. 3. Ficat RP : Treatment of avascular necrosis of the femoral femoral head. In : The Hip. Proceedings of the 11th Open Scientific Meeting of the Hip Society. St Louis: CVMosby, 1983:279-95. 4. Mitchell DG, Rao VM, Dalinka MK, et al : Femoral head avascular necrosis : Correlation with MR imaging, radiographic staging, radionuclide imaging, and clinical. a literature review. Clin Orthop 1990;257: 171-6. 9. Swiontkowski MF, Hansen ST : Percutaneous Neufeld pinning for femoral neck fractures. Clin Orthop 1986; 206 : 113-6. 10. Matsuo K, Hirohata T, Sugioka Y, et al :. Influence of. alcohol intake, cigarette smoking and occupational status on idiopathic osteonecrosis of the femoral head. Clin Orthop 1988;234:115-23. 11. Boettcher WG, Bonfiglio M, Hamilton HR, et al : Nontraumatic necrosis of the femoral head. Part I - relation of altered hemostasis to etiology. J Bone Joint Surg (Am) 1970 ; 52:312-21. 12. Coleman BG, Kressel HY, Dalinka MK, et al : Radiographically negative avascular necrosis: Detection with MR imaging. Radiology 1988;168:525-8..

(4) 46. Magnetic Resonance Imaging Study of Osteonecrosis in the Asymptomatic Hip Yick-Fung Jim, Tung-Ming Chen, and Wu-Chung Shen Department of Radiology, China Medical College Hospital , Taichung, Taiwan, R.O.C.. Osteonecrosis is a common disease; it will lead to difficulty in walking, which decreases the patient s quality of life. Magnetic resonance (MR) imaging is a new and sensitive modality for the early detection of osteonecrosis of the hip. Our study attempted determine the incidence and extent of osteonecrosis in the asymptom atic hip when the patient had osteonecrosis in the other hip joint. We collected 54 cases of proven osteonecrosis of the hip for this study. All patients underwent bilateral MR imaging of the hips. Radiographs and MR images were assembled and assessed for changes in the asymptomatic hip joint. Our results showed that hip radiography detected bony changes in 18.5% cases, while MR imaging showed change of signal intensity in 53.7% of the cases. Obviously, MR imaging is more sensitive than radiographs.The incidence of bilateral involvement of osteonecrosis in the hip joints is relatively high. We suggest MR imaging of both hip joints for early detection of osteonecrosis. Key words asymptomatic osteonecrosis MR imaging femoral head. Received : September 11,1997. Revised : September 30,1997. Accepted : October 24,1997 Address reprint requests to : Yick-Fung Jim, Department of Radiology, No 2,Yuh-Der Road,China Medical College Hospital , Taichung, Taiwan, R.O.C..

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