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Assessing the Effect of Weight-Based Protocol Modifications to Lower Dose for CT-Guided Hepatic and Renal Tumor Radiofrequency Ablations
- Source :
- American Journal of Roentgenology. 210:657-662
- Publication Year :
- 2018
- Publisher :
- American Roentgen Ray Society, 2018.
-
Abstract
- This study assessed radiation dose after CT-guided percutaneous radiofrequency ablations (RFAs) of hepatic and renal tumors and the effect of weight-based CT protocol modification for lowering overall dose in these procedures.CT-guided RFA for renal and hepatic ablations performed from January 1, 2009, through December 31, 2009, were retrospectively reviewed (90 men and 48 women; age, 42-81 years). The radiation dose was recorded during each of the following steps: planning, performing, and postprocedure. Weight-based protocol modification changes in tube voltage and tube current were then applied to renal and hepatic ablations performed subsequently (18 men and 11 women; age, 48-82 years). Image quality, needle localization, lesion detection, ability to detect complications, and overall operator satisfaction were noted for each case (score, 1-5). Dose reduction after modification was then calculated.Retrospective analysis found a mean (± SD) overall CT dose index (CTDI) for CT-guided RFA to be 16.5 ± 2.3 mGy. After protocol modification, the mean CTDI decreased to 6.63 ± 0.67 mGy, a 59.6% reduction overall; for hepatic ablations, the reduction was 65.96% (p0.0001) and the reduction for renal ablations was 38.97% (p = 0.0153). Image quality analysis showed high operator satisfaction (3-5), including adequate needle localization (4-5), lesion visibility (3-5), and high performer confidence (4-5). Higher dose reduction was noted for patients weighing more than 180 lb (82 kg) (p0.0001).Simple weight-based CT protocol modifications can significantly reduce radiation dose during CT-guided percutaneous ablations in the liver and kidneys without significantly sacrificing image quality.
- Subjects :
- Adult
Male
Percutaneous
Hepatic ablation
Radiation Dosage
Radiography, Interventional
030218 nuclear medicine & medical imaging
03 medical and health sciences
0302 clinical medicine
Humans
Medicine
Radiology, Nuclear Medicine and imaging
Renal ablation
Aged
Retrospective Studies
CT protocol
Aged, 80 and over
business.industry
Liver Neoplasms
Radiation dose
General Medicine
Middle Aged
Renal tumor
Kidney Neoplasms
030220 oncology & carcinogenesis
Catheter Ablation
Female
Tomography, X-Ray Computed
business
Nuclear medicine
Weight based dosing
Subjects
Details
- ISSN :
- 15463141 and 0361803X
- Volume :
- 210
- Database :
- OpenAIRE
- Journal :
- American Journal of Roentgenology
- Accession number :
- edsair.doi.dedup.....aeb3b09da1e7ca768a23bc1ccb32e2d1