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CC BY-NC-ND 4.0 · Indian J Radiol Imaging 2019; 29(04): 364-371
DOI: 10.4103/ijri.IJRI_288_19
Musculoskeletal Imaging

Role of the weight-bearing cone-beam CT in evaluation of flatfoot deformity

Khushboo Pilania
Department of Radiodiagnosis, Jankharia Imaging Centre, 383 S V P Road, Bhaveshwar Vihar
,
Bhavin Jankharia
Department of Radiodiagnosis, Jankharia Imaging Centre, 383 S V P Road, Bhaveshwar Vihar
,
Pradeep Monoot
Department of Orthopaedics, Breach Candy Hospital Trust, 60 A Bhulabhai Desai Road
Department of Orthopaedics, Sir H N Reliance Foundation Hospital, Raja Rammohan Roy Rd, Prarthana Samaj, Khetwadi, Girgaon, Mumbai, Maharashtra, India
› Author Affiliations Financial support and sponsorship This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
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Abstract

Introduction: Till date, weight-bearing radiographs have been the cornerstone for planning surgeries on flatfoot. The technique, however, has limitations due to the superimposition of the bones and the lack of reproducibility. Weight-bearing CT with its unique design overcomes these limitations and enables cross-sectional imaging of the foot to be done in the natural weight-bearing position. In this paper, we report our initial experience in weight-bearing cross-sectional imaging of the foot for assessment of flatfoot deformity. Materials and Methods: Around 19 known cases of flatfoot were scanned on the weight-bearing CT. Each foot was then assessed for the various angles and also for the presence/absence of extra-articular talocalcaneal impingement and subfibular impingement. Other associated abnormalities like secondary osteoarthritic changes, were also noted. Results: The Meary, as well as the calcaneal angles, were abnormal, in all but one separate foot. Forefoot abduction was seen in 7 of the 19 feet. The hind foot valgus angle was greater than 10° in all patients. Extra-articular talocalcaneal impingement was seen in 13 of 19 feet. Secondary osteoarthritic changes were seen in 14 feet. Conclusion: Weight-bearing CT scan is a very useful technique for evaluation of flatfoot and associated complications. It overcomes the limitations of the radiographs by providing multiplanar three-dimensional assessment of the foot in the natural weight-bearing position and at the same time being easily reproducible and consistent for the measurements around the foot. The definite advantage over the conventional cross-sectional scanners is the weight-bearing capability.

Keywords

Extremity CT - flatfoot - pes planus - weight-bearing CT


Publication History

Received: 09 July 2019

Accepted: 08 October 2019

Article published online:
21 July 2021

© 2019. Indian Radiological Association. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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