Cardiology 2013. Part II.
March 9, 2014
Notes: Turakhia, Mintu P
Hoang, Donald D
Phibbs, Ciaran S
Than, Claire T
Wang, Paul J
Heidenreich, Paul A
Research Support, Non-U.S. Gov’t
Research Support, U.S. Gov’t, Non-P.H.S.
Am Heart J. 2013 Jan;165(1):93-101.e1. doi: 10.1016/j.ahj.2012.10.010. Epub 2012 Nov 20.
Author Address: Veterans Affairs Palo Alto Health Care System, Palo Alto, CA; Stanford University School of Medicine, Palo Alto, CA 94304, USA. firstname.lastname@example.org
Reference Type: Journal Article
Record Number: 1075Author: Ubeda, C., Vano, E., Gonzalez, L. and Miranda, P.
Title: Influence of the antiscatter grid on dose and image quality in pediatric interventional cardiology X-ray systems
Journal: Catheter Cardiovasc Interv
Date: Jul 1
Short Title: Influence of the antiscatter grid on dose and image quality in pediatric interventional cardiology X-ray systems
Alternate Journal: Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions
ISSN: 1522-726X (Electronic)
Accession Number: 22899572
Keywords: Age Factors
Predictive Value of Tests
*Radiographic Image Interpretation, Computer-Assisted
Thoracic Wall/anatomy & histology/radiography
Abstract: OBJECTIVE: To present a methodology and experimental results to assess the influence, in terms of dose and image quality, of the antiscatter grid (AG) in a pediatric cardiology X-ray system. METHOD: Entrance surface air kerma and image quality, using a test object and different added thicknesses of polymethyl methacrylate (PMMA), for three different acquisition protocols, were measured with and without the AG, for fluoroscopy and cine modes. The image quality parameters, signal-to-noise ratio (SNR), high-contrast spatial resolution (HCSR) and two figures of merit (FOM) were evaluated. RESULTS: The average bucky factor values measured during this experiment were 1.99, 2.49, 2.85, and 3.30, respectively for 4, 8, 12, and 16 cm of PMMA. SNR variations do not appear to be relevant when removing the AG. However, the use of AG improves HCSR significantly. Imaging the test object with 4 cm of PMMA seems appropriate without the AG, but for 8 cm (equivalent to chest thicknesses of 12 cm) and greater thicknesses, a good image quality would require the use of AG. CONCLUSIONS: The AG should not be used for neonates and very young children with chest thicknesses equal to or less than 6 cm and weight less that 6 kg.