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Clinical Implementation
Value Proposition
Ischiofemoral impingement is a disorder of the hip where the space between the lesser trochanter and ischium is too narrow. This can cause the structures that normally course between these two bones to become impinged creating symptoms such as pain or a snapping sensation as the bones pass each other during activities such as walking. When patients are imaged with MRI and have this condition, the anatomic relationship between the lesser trochanter and ischium is abnormal and there is usually edema in a muscle (Quadratus femoris muscle) that courses between the two bones. This is a recently described syndrome in the literature and hence the awareness of this problem among radiologists is low.
Narrative
A 40 year old woman with progressive groin pain has an MRI scan. The relationship of the lesser trochanter with respect to the ischium is abnormal. The radiologist is alerted to the abnormal anatomic relationship of these two bones and can use this information in determining if this could be the cause of a patient’s clinical symptoms. The alert avoids an error of failure to diagnose.
Workflow Description
The hip or pelvis MRI is processed by the algorithm which is tuned to identify the spatial relationship of the relevant anatomical structures as well as edema in the muscle that runs between them. The engine would send a message to PACS with the coordinates of the anatomic structures and would alert the radiologist if the relationship is abnormal.
Considerations for Dataset Development
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Patient Age |
>7 years |
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Procedures |
MRI HIP, MRI PELVIS |
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Sex at Birth |
male, female |
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Differential Diagnoses |
absence of anatomic abnormality, presence of anatomic abnormality |
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MRI data collection technique |
varied |
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Anatomic location |
Hip, pelvis |
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View |
MRI Axial T1, MRI Axial T2, MRI Axial T1 FS (arthrogram) |
Technical Specifications
Inputs
DICOM Study
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Procedure |
MRI pelvis, hip |
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Views |
MRI Axial T1, MRI Axial T2, MRI Axial T1 FS (arthrogram) |
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Data Type |
DICOM |
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Modality |
MRI |
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Body Region |
Pelvis |
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Anatomic Focus |
Hip |
Primary Outputs
IFI Status
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RadElement ID |
RDE795 |
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Definition |
Status of ischiofemoral impingement |
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Data Type |
Categorical |
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Value Set |
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Units |
N/A |
References
1. J Hip Preserv Surg. 2016 Aug; 3(3): 197–202.
Published online 2016 Mar 1. doi: 10.1093/jhps/hnw003
PMCID: PMC5005057
PMID: 27583158
2. Torriani M, Souto SC, Thomas BJ, et al. Ischiofemoral impingement syndrome: an entity with hip pain and abnormalities of the quadratus femoris muscle. Am J Roentgenol 2009;193:186–90.
3 Narrowing of ischiofemoral and quadratus femoris spaces in pediatric ischiofemoral impingement
Shlomit Goldberg-Stein1 & Avi Friedman1 & Qi Gao2 & Jaeun Choi2 & Jacob Schulz3 & Eric Fornari3 & Benjamin Taragin4,5
Related Datasets
No known related public datasets at this time, please us alert us if you know of any.