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MR imaging of tophaceous gout
Yu, J S; Chung, C; Recht, M; Dailiana, T; Jurdi, R
OBJECTIVE: MR imaging is not routinely used for evaluation of tophaceous gout. However, gout may present clinically in an atypical, unusual, or confusing manner. A gouty tophus occasionally mimics an infectious or neoplastic process, and MR imaging may be obtained under these circumstances. The purpose of this study was to determine the MR imaging characteristics of intraosseous and soft-tissue tophi. MATERIALS AND METHODS: We identified 13 MR imaging examinations performed during a 27-month period on nine patients with gouty arthritis. All were men 42-70 years old. T1-, proton density-, and T2-weighted spin-echo MR images were obtained for all the examinations. Nine examinations included contrast-enhanced MR images. The findings were then evaluated, as were the corresponding radiographs. RESULTS: Five patients presented with articular involvement, three patients with an isolated soft-tissue mass, and one patient with persistent soft-tissue swelling. The duration of symptoms ranged from 3 months to more than 20 years. Nearly all the tophi were of intermediate signal intensity on T1-weighted images. On T2-weighted images, three sites revealed an overall increase in the signal intensity of the tophi, whereas 10 studies showed a heterogeneous decrease in signal intensity. All but one tophus showed homogeneous enhancement. Erosion of adjacent bone, synovial pannus, joint effusion, soft-tissue edema, and bone marrow edema were common associated findings. CONCLUSION: The MR appearance of tophi in patients with tophaceous gout is constant on T1- but quite variable on T2-weighted images. This variability in signal intensity could be related to calcium within a tophus. Tophaceous gout should be considered in the differential diagnosis when a mass reveals heterogeneously low to intermediate signal intensity, particularly if the adjacent bone shows typical erosive changes or if other joints are involved. When faced with this situation, radiologists may find it helpful to obtain a further clinical history and recommend evaluating the patient's serum urate level
PMID: 9016240
ISSN: 0361-803x
CID: 97831
MR imaging of the knee ligaments and the postoperative knee
Irizarry, J M; Recht, M P
MR imaging is an accurate, noninvasive, and cost-effective method for the evaluation of acute knee ligament injuries and in the examination of the postoperative knee. Understanding the normal anatomy and the pertinent clinical aspects of knee injuries is a prerequisite for accurate interpretation of MR imaging studies. The increasing popularity of ACL reconstruction following disruption of this ligament requires knowledge of the various surgical techniques and their MR imaging appearance as well as the appearance of possible complications
PMID: 8998209
ISSN: 0033-8389
CID: 87095
MR imaging of the musculoskeletal system : current status and future direction
Pathria, Mini N; Recht, Michael P; Resnick, Donald Laurence
[Oak Brook IL] : Radiological Society of North America, 1997
Extent: 1 videocassette (86 min)
ISBN: n/a
CID: 1800
The Knee
Chapter by: Deutsch AL; Mink JH; DeSmet AA; Tuite MJ; Stoller DW; Peterfy CG; Recht MP
in: MRI of the musculoskeletal system : a teaching file by Deutsch AL; Mink JH [Eds]
Philadelphia : Lippincott-Raven, 1997
pp. 347-460
ISBN: 039751672x
CID: 4994
Three-dimensional computer models: Aid to understanding the MR appearance of meniscal tears [Meeting Abstract]
Recht, MP; Piraino, DW; Paletta, GA; Schils, JP; Richmond, BJ; Byerman, B
ISI:A1996VP84302592
ISSN: 0033-8419
CID: 97849
Subtle fractures about the knee: innocuous-appearing yet indicative of significant internal derangement
Delzell, P B; Schils, J P; Recht, M P
PMID: 8751684
ISSN: 0361-803x
CID: 87097
Complications after anterior cruciate ligament reconstruction: radiographic and MR findings
Recht, M P; Piraino, D W; Applegate, G; Richmond, B J; Yu, J; Parker, R D; Andrish, J T
PMID: 8751685
ISSN: 0361-803x
CID: 87096
Lesions of the acetabular labrum: accuracy of MR imaging and MR arthrography in detection and staging
Czerny, C; Hofmann, S; Neuhold, A; Tschauner, C; Engel, A; Recht, M P; Kramer, J
PURPOSE: To determine the accuracy of magnetic resonance (MR) imaging and MR arthrography in the detection and staging of lesions of the acetabular labrum. MATERIALS AND METHODS: Fifty-seven hips of 56 patients with chronic hip pain and a strong clinical suspicion of labral lesions were examined with a three-dimensional gradient-echo sequence in the coronal oblique and sagittal oblique projections before and after the intraarticular injection of gadopentetate dimeglumine. The labra were evaluated on the basis of morphology, signal intensity, the presence or absence of a tear, and their attachment to the acetabulum. Twenty-two of the hips underwent surgical intervention, and 35 hips were treated conservatively. RESULTS: Twenty of the 22 labra with surgical proof were staged accurately with MR arthrography. On the conventional MR images, only eight of the 22 labra were staged correctly. Whereas the sensitivity of MR arthrography was 90% and its accuracy was 91%, the sensitivity of MR imaging was 30% and its accuracy was 36%, compared with surgical findings. CONCLUSION: MR arthrography enables accurate detection and staging of lesions of the acetabular labrum and appears to be indicated in the assessment of chronic hip pain in patients with a strong suspicion of labral lesions
PMID: 8657916
ISSN: 0033-8419
CID: 87098
Acromial morphology: relation to sex, age, symmetry, and subacromial enthesophytes
Getz, J D; Recht, M P; Piraino, D W; Schils, J P; Latimer, B M; Jellema, L M; Obuchowski, N A
PURPOSE: To evaluate acromial shape in relation to age, sex, symmetry, and presence of subacromial enthesophytes. MATERIALS AND METHODS: Three hundred ninety-four cadaveric scapulas were reviewed. Specimens were categorized by sex and age (age range, 20-89 years). Acromial morphology was typed according to the Bigliani classification: type I, flat; type II, curved; and type III, hooked. The presence and degree of subacromial enthesopathy was recorded. Selective radiographic correlation was obtained. RESULTS: The relative percentages of acromial types I, II, and III were 22.8% (90 acromions), 68.5% (270 acromions), and 8.6% (34 acromions), respectively. There was a greater percentage of type III in men (10.2% [21 of 205] vs 6.9% [13 of 189] and type I in women (27.5% [52 of 189] vs 18.5% [38 of 205]). There was no relationship between acromial type and age (P = .667). Enthesophytes were most common in type III (20 [59%] of 34 acromions) versus type II (115 [42.6%] of 270 acromions) and type I (22 [24%] of 90 acromions). Acromial morphology was symmetric in 135 (70.7%) of 191 pairs of acromions and asymmetric in 56 pairs (29.3%). CONCLUSION: Acromial shape does not vary significantly with age. It does, however, differ between sexes. The relative percentages of the types differ from previously reported values. Acromial shape tends to be symmetric. A trend between acromial type and the presence of enthesophytes is observed
PMID: 8637998
ISSN: 0033-8419
CID: 87099
Optimization of a dual echo in the steady state (DESS) free-precession sequence for imaging cartilage
Hardy, P A; Recht, M P; Piraino, D; Thomasson, D
Three-dimensional (3D) MR imaging of the knee is useful to detect cartilage abnormalities, although the tissue contrast in 3D gradient-recalled echo (GRE) sequences such as gradient-recalled acquisition in the steady state (GRASS) or fast low-angle shot (FLASH) is poor. T2 contrast can be added to a GRASS sequence by combining the signals from the first and second gradient echoes, which form immediately after and immediately before each radio frequency (RF) pulse in a 3D GRE sequence. We have optimized a 3D dual echo in the steady state (DESS) sequence, which produces one averaged image from the two echoes, for use in the detection of articular cartilage abnormalities. In the optimization process, we examined the imaging parameters of flip angle (alpha), repetition time (TR), echo time (TE), and bandwidth to maximize the contrast between cartilage and joint fluid. A theoretical simulation of the sequence was confirmed with experiments conducted on phantoms with known T1 and T2. On the basis of theoretical predictions and experiments using healthy volunteers, we determined that an optimized sequence with a bandwidth of 98 Hz per pixel, TR of 30 msec, a TE of 7.1 msec, and an alpha of 60 degrees produced the highest contrast between cartilage and fluid within a defined acquisition time of 6 minutes. Additional contrast was obtained by filtering the second-echo image to eliminate noise before adding it to the first-echo image
PMID: 9132098
ISSN: 1053-1807
CID: 87100