Preliminary imaging evaluation of a compact tomosynthesis system for potential point-of-care extremity imaging

Inscoe, Christina R.; Billingsley, Alex J.; Puett, Connor; Nissman, Daniel; Lü, Jianping; Lee, Yueh Z.; Zhou, Otto

doi:10.1117/12.2549329

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“…In the present study investigating the distal portion of equine forelimbs, all images within a single plane were acquired in an approximately 15-second period, whereas the duration of CT and MRI examinations was approximately 5 and 30 minutes, respectively. The evaluated tomosynthesis system with a 12° angular span was an early prototype, which has subsequently been modified to perform a scan with a 40° angular span in approximately the same time (a scan with a 12° angular span requires approx 1 second to perform 23 ). This adapted system would be expected to improve lesion conspicuity.…”

Section: Discussionmentioning

confidence: 99%

Comparative evaluation of tomosynthesis, computed tomography, and magnetic resonance imaging findings for metacarpophalangeal joints from equine cadavers

Stewart

Kawcak

Inscoe³

et al. 2021

ajvr

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OBJECTIVE To describe the technique and assess the diagnostic potential and limitations of tomosynthesis for imaging of the metacarpophalangeal joint (MCPJ) of equine cadavers; compare the tomosynthesis appearance of pathological lesions with their conventional radiographic, CT, and MRI appearances; and evaluate all imaging findings with gross lesions of a given MCPJ. SAMPLE Distal portions of 4 forelimbs from 4 equine cadavers. PROCEDURES The MCPJs underwent radiography, tomosynthesis (with a purpose-built benchtop unit), CT, and MRI; thereafter, MCPJs were disarticulated and evaluated for the presence of gross lesions. The ability to identify pathological lesions on all images was assessed, followed by semiobjective scoring for quality of the overall image and appearance of the subchondral bone, articular cartilage, periarticular margins, and adjacent trabecular bone of the third metacarpal bone, proximal phalanx, and proximal sesamoid bones of each MCPJ. RESULTS Some pathological lesions in the subchondral bone of the third metacarpal bone were detectable with tomosynthesis but not with radiography. Overall, tomosynthesis was comparable to radiography, but volumetric imaging modalities were superior to tomosynthesis and radiography for imaging of subchondral bone, articular cartilage, periarticular margins, and adjacent bone. CONCLUSIONS AND CLINICAL RELEVANCE With regard to the diagnostic characterization of equine MCPJs, tomosynthesis may be more accurate than radiography for identification of lesions within subchondral bone because, in part, of its ability to reduce superimposition of regional anatomic features. Tomosynthesis may be useful as an adjunctive imaging technique, highlighting subtle lesions within bone, compared with standard radiographic findings.

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Section: Discussionmentioning

confidence: 99%