A study of the correlation between dose area product and effective dose in vascular radiology

Abstract

The purpose of the multi-centre study was to assess dose area product (DAP) and effective dose of patients undergoing angiography of the lower limbs in Belgium and to investigate the correlation between DAP and effective dose. DAP values were measured in 12 centres and compared with the national diagnostic reference levels (DRLs). The effective dose (E) was estimated by multiplying the DAP with case-specific conversion coefficients (CCs) that were calculated with Monte Carlo software MCNP5. As a model for the patient, a mathematical hermaphrodite phantom was used. Calculations showed that tube configurations and extra Cu filtration have a large influence on these CCs. Due to the use of Cu filtration, effective dose can be twice as high for comparable DAP values. Also the use of an over-couch tube configuration is a disadvantage when compared with the under-couch tube configuration. For centres working under-couch without the use of extra Cu-filtration, the DAP values correlate very well with effective dose (Spearman's rank correlation rho ; = 0.97). For these conditions, general CCs between DAP and E were calculated. They were 0.083 mSv Gy(-1) cm(-2) (ICRP 60) and 0.065 mSv Gy(-1) cm(-2) (ICRP 103).

A hybrid phantom system for patient skin and organ dosimetry in fluoroscopically guided interventions

“…Published reports have provided methods for assessing skin dose in real‐time, skin dose post‐procedure, and absorbed organ doses with the use of dose coefficients (DCs) from FGIs . Organ dose coefficients are typically normalized to kerma‐area product (KAP) such that the product of the measured KAP and the appropriate DC is a measure of either effective dose or individual organ dose for a fixed x‐ray projection.…”

Patient radiation exposure during percutaneous endovascular revascularization of the lower extremity

“…As shown in Table IV, previously reported radiation doses in lower extremity endovascular interventions are of the same magnitude as in the present report. 13,15,19,25,35,36 It must also be noted that while it is known that one of the most important factors affecting radiation dose in a procedure is the operator, 7 we did not find significant differences between our various operators. We analyzed our operators' performance in several control procedures as a measure of their general irradiation behavior.…”

Review of air kerma‐area product, effective dose and dose conversion coefficients for non‐cardiac interventional fluoroscopy procedures

“…Some of the literature uses very specific categories, based on the specific type and anatomic location of procedures, and sometimes on the indication for the procedure . Other literature uses more general categories . Some of the literature uses both specific and general categories, depending on the procedure .…”

“…E may be calculated for interventional fluoroscopy examinations in different ways . In some publications, E is determined by using the irradiation geometry for the clinical protocol and radiation dose data for clinical procedures as inputs into a Monte Carlo radiation transport simulation that uses computational models of human anatomy . In other publications, the irradiation geometry for the clinical protocol and radiation dose data for clinical procedures are used as parameters for irradiation of physical anthropomorphic phantoms containing dosimeters .…”