The effect on patient dose and image quality of simultaneous acquisition of high-resolution small field of view (FOV) and regular-resolution large FOV imaging modes of a dual-resolution imaging detector

S. V. Setlur Nagesh; D. R. Bednarek; S. Rudin

doi:10.1117/12.2549244

16 March 2020 The effect on patient dose and image quality of simultaneous acquisition of high-resolution small field of view (FOV) and regular-resolution large FOV imaging modes of a dual-resolution imaging detector

S. V. Setlur Nagesh, D. R. Bednarek, S. Rudin

Author Affiliations +

Proceedings Volume 11312, Medical Imaging 2020: Physics of Medical Imaging; 113120Y (2020) https://doi.org/10.1117/12.2549244
Event: SPIE Medical Imaging, 2020, Houston, Texas, United States

Abstract

A new imaging x-ray detector with 194μm pixel conventional FPD imaging mode for large area visualization with detector field-of-views (FOV) ranging from 12 inch to 6 inch and a 76μm pixel high resolution high-definition (Hi-Def) zoom mode for smaller region-of-interest (ROI) visualization with FOV’s from 3 to 1.5 inches in one detector panel was built to improve visualization of endovascular devices during neurovascular interventions. In this work we investigate the effect of simultaneous use of both imaging modes on entrance kerma area product (KAP) and scatter at the detector. The entrance KAP and the scatter reaching the detector during simultaneous acquisition is the same as the large FOV FPD mode acquisitions, both higher than just Hi-Def mode acquisition. When a 0.7mm thick differential ROI Cu attenuator with a circular 10mm hole was aligned to the Hi-Def detector area, the entrance air kerma is reduced by 70%. To study the effect of scatter on image quality, Hi-Def images of the devices such as guide catheter and stents placed on a head equivalent phantom were acquired with the x-ray field opened to 8inch FOV, with and without the grid. Compared to the 3 inch Hi-Def FOV, with the grid the contrast of the guide catheter tip was reduced by 11% when the FOV was opened to 8 inch; however, without the grid the reduction in contrast was 36%. With the ROI attenuator and no grid the contrast was reduced by 16% when the FOV was opened to 8inch.

Conference Presentation

Citation Download Citation

S. V. Setlur Nagesh, D. R. Bednarek, and S. Rudin "The effect on patient dose and image quality of simultaneous acquisition of high-resolution small field of view (FOV) and regular-resolution large FOV imaging modes of a dual-resolution imaging detector", Proc. SPIE 11312, Medical Imaging 2020: Physics of Medical Imaging, 113120Y (16 March 2020); https://doi.org/10.1117/12.2549244

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE