Patel Anish, Azzopardi Christine, Evans Scott, Davies A Mark, James Steven, Botchu Rajesh
Department of Musculoskeletal Imaging, Royal Orthopaedic Hospital, Birmingham, UK.
Department of Orthopedic Oncology, Royal Orthopaedic Hospital, Birmingham, UK.
J Clin Orthop Trauma. 2022 Sep 23;34:102028. doi: 10.1016/j.jcot.2022.102028. eCollection 2022 Nov.
To determine the optimal KV and mAs settings during CT guided injections in the presence of a total hip arthroplasty so that image quality is maintained whist keeping the dose as low as reasonably achievable.
A total hip arthroplasty phantom with needles with differing gauges was scanned using different CT parameters (from low dose to high dose) and evaluating if this had any effect on needle conspicuity. Conspicuity was graded from 1 to 3 by 2 independent blinded reviewers.
Irrespective of the CT settings used (high dose or low dose parameters) needle conspicuity was not adversely affected by the THA for either scorer, therefore a kVp of 100 mA and a. In addition the needle gauge did not affect the conspicuity of the needle.
CT guided injections in this total hip arthroplasty phantom model can be performed without any adverse effect on the conspicuity of the needle tip on low dose CT settings.
This paper enables one to optimise the kV and mA while performing interventional procedures.
确定在全髋关节置换术存在的情况下，CT引导注射时的最佳千伏（kV）和毫安秒（mAs）设置，以便在将剂量保持在合理可达到的最低水平的同时维持图像质量。
使用不同的CT参数（从低剂量到高剂量）对带有不同规格针头的全髋关节置换术模型进行扫描，并评估这是否对针头的显影有任何影响。由2名独立的盲法评审员将显影程度从1到3进行分级。
无论使用何种CT设置（高剂量或低剂量参数），对于任何一位评分者而言，全髋关节置换术均未对针头显影产生不利影响，因此千伏峰值为100毫安，并且……此外，针头规格并未影响针头的显影。
在该全髋关节置换术模型中进行CT引导注射，在低剂量CT设置下对针尖显影不会产生任何不利影响。
本文使人们在进行介入操作时能够优化千伏和毫安设置。
