New real-time patient radiation dosimeter for use in radiofrequency catheter ablation

Abstract

In a previous study, we reported on a novel (prototype) real-time patient dosimeter with non-toxic phosphor sensors. In this study, we developed new types of sensors that were smaller than in the previous prototype, and clarified the clinical feasibility of our newly proposed dosimeter. Patient dose measurements obtained with the newly proposed real-time dosimeter were compared with measurements obtained using a calibrated radiophotoluminescence glass reference dosimeter (RPLD). The reference dosimeters were set at almost the same positions as the new real-time dosimeter sensors. We found excellent correlations between the reference RPLD measurements and those obtained using our new real-time dosimeter (r2 = 0.967). However, the new type of dosimeter was found to underestimate radiation skin dose measurements when compared with an RPLD. The most probable reason for this was the size reduction in the phosphor sensor of the new type of dosimeter. We believe that, as a result of reducing the phosphor sensor size, the backscattered X-ray irradiation was underestimated. However, the new dosimeter can accurately determine the absorbed dose by correcting the measured value with calibration factors. The calibration factor for the new type dosimeter was determined (by linear regression) to be ~1.15. New real-time patient dosimeter design would be an effective tool for the real-time measurement of patient skin doses during interventional radiology treatments.

Non-Lead Protective Aprons for the Protection of Interventional Radiology Physicians from Radiation Exposure in Clinical Settings: An Initial Study

“…Although the wide acceptance of IVR procedures, such as PCI, has led to increasing numbers of interventions being performed, radiation exposures from IVR are conclusively higher, exposing both the IVR staff and the patient to high radiation doses. [ 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ].…”

Fetal radiation dose of four tube voltages in abdominal CT examinations during pregnancy: A phantom study

“…2), which is a very simple and immediate reading dose measurement method without heating and annealing, compared to the conventional methods, such as thermoluminescent dosimeters 16 and radiophotoluminescence glass dosimeters 23 . This RTD comprised photoluminescence sensors (Y 2 O 2 S: Eu, Sm), an optical fiber cable, a photodiode, and a digital display that included the power supply, and can measure using a maximum of four sensors in one measurement 24–27 . The photoluminescence sensor size had a cylindrical shape with dimensions φ4.1 × 11.5 mm.…”

Patients’ Radiation Shielding in Interventional Radiology Settings: A Systematic Review

“…In particular, which require the integration of novel modalities to reduce the maximum skin dose during radiation exposure (Dskin, max) [6,7]. Additionally, previous studies have demonstrated that an estimation of Dskin, max can be undertaken using various modalities including metaloxide-semiconductor field-effect transistors, four photoluminescence sensors attached to the back of the patients, and wireless dosimeter modalities [8][9][10][11]. Although this approach has been previously reported to have various benefits when estimating the real-time data of radiation exposure, subsequent evidence indicates that it had some limitations which restrict its benefits to specific institutions [12,13].…”