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The principal objective of the study is to compare between CT and MRI diagnostic performance (sensibility and specificity) in the preoperative assessment of neurogenic para-osteo-arthritis.
The second objectives of the study are:
This is a study on diagnostic performance, non randomized, versus Gold standard (a prospective multicentric cohort).
All eligible patients will be proposed consecutively to participate to the study, to undergo preoperative CT scan and MRI examination as usual procedure. The only additional action in this study will be a neurography sequence of type fluorescence subtraction imaging (FSI) during MRI, permitting to obtain more details in visualization of nerve structure and their relations of the ossifications.
The enrollment visit will performed by neuro-orthopaedic surgeon during preoperative consultation.
The follow-up visit will be an usual post-operative visit, non-specific for the study.
The duration for each participant will compound 1 month (the duration between preoperative imaging and surgical resection) added by up to two months of post-operative follow-up.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Preoperative evaluation: CT + MRI | Experimental | Preoperative evaluation by 2 examinations: CT scan and MRI.
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| CT scan | Other | CT scan with biphasic injection of contrast product |
| |
| Measure | Description | Time Frame |
|---|---|---|
| Analysis and comparison of accurate topography of heterotopic ossification on the CT and the MRI | Comparison of preoperative diagnostic performances of CT scan and MRI, based on analysis of topography of heterotopic ossification. On each CT and MRI exam, analysis of accurate topography of heterotopic ossifications relative to the bones, the number of fragments, their relationships with the articular capsule, their mineralization, and the mineralization of the underlying bone. | through study completion, an average of 2 year |
| Analysis and comparison of reporting arterial and venous anatomy | Comparison of preoperative diagnostic performances of CT scan and MRI, based on analysis of reporting arterial and venous anatomy. On each CT and MRI exam, analysis of vascular (arterial and veinous) relations with the heterotopic ossifications, in the case of contact specify the existence of a gutter or a tunnel, and the vessels permeability or occlusion. | through study completion, an average of 2 year |
| Analysis and comparison of reporting nervous structures | Comparison of preoperative diagnostic performances of CT scan and MRI, based on analysis of reporting nervous structures. On each CT and MRI exam, analysis of nervous structures relations with the heterotopic ossifications, in the case of contact specify the existence of a gutter or a tunnel, and the the existence of suffering nerve or denervation signs. | through study completion, an average of 2 year |
| Measure | Description | Time Frame |
|---|---|---|
| Performances of MRI for diagnosis of arterial-venous | Performances of MRI for diagnosis of arterial-venous relation (gutter, stenosis, thrombosis or vascular occlusion, collateral circulation...) | through study completion, an average of 2 year |
| Performances of MRI for diagnosis of nervous structures (nerve's location, nerve signal anomalies, signs of suffering and denervation...) |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Robert Carlier, MD, PhD | Service d'Imagerie médicale, Hôpital Raymond Poincaré, Garches | Principal Investigator |
| Raphaël AMAR, Resident | Service d'Imagerie médicale, Hôpital Raymond Poincaré, Garches | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Service d'Imagerie médicale, Hôpital Raymond Poincaré | Garches | Hauts-de-Seine | 92380 | France |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 34930354 | Derived | Amar R, Thiry T, Salga M, Safa D, Chetrit A, Gatin L, Carlier RY. Comparison of magnetic resonance imaging and computed tomography for bone assessment of neurogenic heterotopic ossification of the hip: a preliminary study. J Orthop Surg Res. 2021 Dec 20;16(1):725. doi: 10.1186/s13018-021-02869-6. |
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| MRI examination |
| Other |
MRI with injection of contrast |
|
| through study completion, an average of 2 year |
| Rate of incidence of adverse event during surgical operation | The rate of incidence of adverse event during surgical procedure will be calculated. | through study completion, an average of 2 year |
| Concordance correlation coefficient | Concordance correlation coefficient two by two (Gwet concordance coefficient for binary qualitative variables; and W of Kendal concordance coefficient for ordinal qualitative variables or quantitative variables) between results of preoperative MRI and CT and operative report describing arterial-venous relation, and nervous structures. | through study completion, an average of 2 year |
| Characteristic of patients with discordant results | Identify all discordances between CT or MRI and the surgery findings, about topography of heterotopic ossification, vascular relations and nervous structures relations. Analysis of characteristics of patients with discordant results between preoperative MRI resluts or preoperative CT results relative to the operative report. | through study completion, an average of 2 year |