Contrast Enhanced Magnetic Resonance Imaging for Femoral Neck Fracture

Kamano, Masayuki; Narita, Shinya; Honda, Yoshinobu; Fukushima, Kenzo; Yamano, Yoshiki

doi:10.1097/00003086-199805000-00025

Cited by 22 publications

(18 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Although it has not been established whether the pathomechanism is common between traumatic, immune-mediated, and steroid-rela ted osteonecrosis. it may be useful to study patients with early clinical osteonecrosis after organ transplantation (8) or transcervical fractures of the femur (7,23) because the onset 01 the episode (transplantation or Iracture) is clear, the osteonecrosis can he proved to be early, and such patients with high risk of osteonecrosis can be monitored before it develops. Furthermore, such studies may provide some important information about the pathomechanism of ostconecrosis.…”

Section: Discussionmentioning

confidence: 99%

“…Stage 1 (preradiographic stage; international classification by the Association Research Circulation Osseous 1221) ol osteonecrosis in asymptomatic hips can be detected clearly by MRI (3. 7,12,24). On the other hand, conventional MRI cannot detect any necrotic lesions during Stage 0, which is defined as the stage that all except histological diagnostic studies show as normal.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Contrast‐enhanced magnetic resonance imaging in a nontraumatic rabbit osteonecrosis model

Sakai

Sugano

Tsuji³

et al. 1999

Journal Orthopaedic Research

View full text Add to dashboard Cite

We investigated early osteonecrosis using in vivo magnetic resonance imaging in a nontraumatic rabbit model of serum-sickness osteonecrosis in which osteonecrosis was induced after two intravenous injections of horse serum with a 3-week interval. One week (group A, 17 rabbits) and 3 weeks (group B, 13 rabbits) after the second serum injection, coronal magnetic resonance images of the femur were obtained and it was removed for histological study. Some of the necrotic lesions in the diaphysis were detected on T1-weighted, T2-weighted, or fat-suppression T1-weighted images (six of 24 necrotic lesions in group A and 16 of 18 in group B), and all of the necrotic lesions in the epiphysis, metaphysis, and diaphysis were detected on T1-weighted or fat-suppression T1-weighted images enhanced with gadolinium-diethylene triamine pentaacetic acid. All focal homogeneous enhanced areas on T1-weighted or fat suppression T1-weighted images corresponded to necrotic lesions (22 of 24 necrotic lesions in group A and 18 of 18 in group B); the contours of the enhanced areas were displayed more clearly on the fat-suppression T1-weighted than on the T1-weighted images. The fat-suppression T1-weighted image enhanced with gadolinium-diethylene triamine pentaacetic acid was thus the most sensitive and specific of five kinds of magnetic resonance images for the detection of early necrotic lesions. The results suggest that this image may be useful for early diagnosis of clinical osteonecrosis and for obtaining information about the pathomechanism of osteonecrosis.

show abstract

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Contrast‐enhanced magnetic resonance imaging in a nontraumatic rabbit osteonecrosis model

Sakai

Sugano

Tsuji³

et al. 1999

Journal Orthopaedic Research

View full text Add to dashboard Cite

show abstract

“…The odds ratio to develop avascular necrosis in dislocations reduced after 12 hours have elapsed is 5.6 compared with those reduced before 12 hours (71). It is important for the radiologist to be alert to subtle findings of dislocation on the AP radiograph of the pelvis obtained as part of the trauma series, as hip dislocation seen at initial trauma CT or radiog-far demonstrated mixed results in the setting of femoral neck fractures (73).…”

Section: Long-term Complications Of Hip Dislocationmentioning

confidence: 99%

Traumatic Hip Dislocation: What the Orthopedic Surgeon Wants to Know

et al. 2017

View full text Add to dashboard Cite

Hip dislocation is an important orthopedic emergency usually seen in young patients who have experienced high-energy trauma, often resulting in significant long-term morbidity. Rapid identification and reduction is critical, as prolonged dislocation increases the risk of developing avascular necrosis of the femoral head, and posttraumatic osteoarthritis is a common complication, even in the absence of associated fractures. Identification and timely management of hip dislocation are highly dependent on imaging, both at presentation and after attempted reduction. It is imperative for the radiologist to understand imaging features that guide management of hip dislocation to ensure timely identification, characterization, and communication of clinically relevant results. Although the importance of prompt identification of hip dislocation is universally recognized, the significance of imaging features that guide correct management and are thought to prevent complications is less emphasized in the radiology literature. In this article, the authors review the anatomy of the hip, common injury mechanisms for various types of dislocations, and imaging findings for associated injuries. They review the most commonly used classification systems and propose a simplified checklist approach to hip dislocation to aid rapid interpretation and communication of the most clinically relevant imaging features to the treating orthopedic surgeon. RSNA, 2017.

show abstract

“…Contrast enhanced MRI and dynamic contrast enhanced MRI (DCE-MRI) have been reported to be more reliable than MRI without contrast enhancement in the assessment of femoral head vascularity [12][13][14][15][16][17][18][19]. The disadvantage of MRI is the metal artifact interference with image quality following internal fixation of acetabular fractures using stainless steel implants.…”

Section: Discussionmentioning

confidence: 99%

Positron emission tomography–computed tomography in the assessment of viability of femoral head in acetabular fractures

Belehalli¹,

Kumar²,

Prakash³

et al. 2014

International Orthopaedics (SICOT)

View full text Add to dashboard Cite

Purpose The aim of this study was to use positron emission tomography-computed tomography (PET-CT) imaging as a tool for assessment of viability of femoral head in acetabular fractures and help in early detection of complications like avascular necrosis (AVN) of the femoral head. Methods In our study PET-CT was done pre-operatively and six weeks postoperatively in 31 patients who underwent open reduction and internal fixation (ORIF) of acetabular fractures and fracture-dislocations. There were 26 male and five female patients who were treated in our institute between January 2009 and July 2010. Patients were subsequently followed up with plain radiographs for a mean period of 3.8 years and minimum of two years. Results Although seven out of 31 patients showed avascularity of the femoral head on PET-CT in the pre-operative period, only two patients progressed to AVN at final follow up, whereas the other five patients regained the vascularity at the end of six weeks. There was no statistically significant correlation between vascular status on pre-operative scan and the presence of AVN on final follow-up radiograph. There was a significant correlation between avascularity of the femoral head on the sixth week PET-CT and AVN in the final radiograph. Conclusion PET-CT seems to be useful as a prognostic investigation in the assessment of the vascular status of the femoral head following injuries around the hip. Both pre-operative and postoperative imaging are necessary to understand the timedependent changes in blood flow following injury.

show abstract

Contrast Enhanced Magnetic Resonance Imaging for Femoral Neck Fracture

Cited by 22 publications

References 0 publications

Contrast‐enhanced magnetic resonance imaging in a nontraumatic rabbit osteonecrosis model

Contrast‐enhanced magnetic resonance imaging in a nontraumatic rabbit osteonecrosis model

Traumatic Hip Dislocation: What the Orthopedic Surgeon Wants to Know

Positron emission tomography–computed tomography in the assessment of viability of femoral head in acetabular fractures

Contact Info

Product

Resources

About