Developing low-dose C-arm CT imaging for temporomandibular joint (TMJ) disorder in interventional radiology
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Xiaowei Zhu & Marc Felice & Laura Johnson & Marily Sarmiento & Anne Marie Cahill
- چاپ و سال / کشور: 2010
Description
Background Manufacturers have provided C-arm CT imaging technologies for applications in interventional radiology in recent years. However, clinical imaging protocols and radiation doses have not been well studied or reported. Objective The purpose of this study is to develop low-dose settings for clinically acceptable CT imaging of temporomandibular joint in interventional radiology suites, using a C-arm imaging angiography system. Materials and methods CT scans were performed with a flat-panel digital C-arm angiographic system on a 5-yearold anthropomorphic phantom. The CTDI was determined for various rotation times, dose settings and Cu filter selections. The CTDI values were compared with those of conventional low-dose CT for the same phantom. The effectiveness of using Cu filters to reduce dose was also investigated. Images were reviewed by a senior radiologist for clinical acceptance. Results The manufacturer’s default setting gave an equivalent CTDI of 4.8 mGy. Optimizing the dose settings and adding copper filtration reduced the radiation dose by 94%. This represents a 50% reduction from conventional CT. Conclusion Use of Cu filters and low-dose settings significantly reduced radiation dose from that of standard settings. This phantom study process successfully guided the clinical implementation of low-dose studies for all ages at our institution.
Pediatr Radiol (2011) 41:476–482 DOI 10.1007/s00247-010-1885-2 Received: 20 May 2010 / Revised: 8 September 2010 / Accepted: 4 October 2010 / Published online: 16 November 2010
