Characteristics of a New X-Ray Imaging System for Interventional Procedures: Improved Image Quality and Reduced Radiation Dose

Ruediger E. Schernthaner, Reham R. Haroun, Sonny Nguyen, Rafael Duran, Jae Ho Sohn, Sonia Sahu, Julius Chapiro, Yan Zhao, Alessandro Radaelli, Imramsjah M. van der Bom, Maria Mauti, Kelvin Hong, Jean François H. Geschwind, Ming De Lin

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: To compare image quality and radiation exposure between a new angiographic imaging system and the preceding generation system during uterine artery embolization (UAE). Materials and Methods: In this retrospective, IRB-approved two-arm study, 54 patients with symptomatic uterine fibroids were treated with UAE on two different angiographic imaging systems. The new system includes optimized acquisition parameters and real-time image processing algorithms. Air kerma (AK), dose area product (DAP) and acquisition time for digital fluoroscopy (DF) and digital subtraction angiography (DSA) were recorded. Body mass index was noted as well. DF image quality was assessed objectively by image noise measurements. DSA image quality was rated by two blinded, independent readers on a four-rank scale. Statistical differences were assessed with unpaired t tests and Wilcoxon rank-sum tests. Results: There was no significant difference between the patients treated on the new (n = 36) and the old system (n = 18) regarding age (p = 0.10), BMI (p = 0.18), DF time (p = 0.35) and DSA time (p = 0.17). The new system significantly reduced the cumulative AK and DAP by 64 and 72%, respectively (median 0.58 Gy and 145.9 Gy*cm2 vs. 1.62 Gy and 526.8 Gy*cm2, p < 0.01 for both). Specifically, DAP for DF and DSA decreased by 59% (75.3 vs. 181.9 Gy*cm2, p < 0.01) and 78% (67.6 vs. 312.2 Gy*cm2, p < 0.01), respectively. The new system achieved a significant decrease in DF image noise (p < 0.01) and a significantly better DSA image quality (p < 0.01). Conclusions: The new angiographic imaging system significantly improved image quality and reduced radiation exposure during UAE procedures.

Original languageEnglish (US)
Pages (from-to)502-508
Number of pages7
JournalCardiovascular and interventional radiology
Volume41
Issue number3
DOIs
StatePublished - Mar 1 2018

Keywords

  • Image quality enhancement
  • Interventional radiology
  • Radiation dosage

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

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