Optimization of dose and image quality for computed radiography and digital radiography

Journal of Digital Imaging
John E AldrichJohn R Mayo

Abstract

The surface doses to patients during chest, abdomen and pelvis radiography were measured over a period of 3 years, during which time computed radiography (CR) and digital radiography (DR) systems were introduced to replace film-screen systems. For film-screen and CR the surface doses were measured with thermoluminescent dosimeters. For DR the surface doses were calculated from the dose-area product (DAP) meter readings. Measurements were made for each type of examination and detector type on 10 average-size patients. Measurements were made immediately after the new systems were introduced, and subsequently as adjustments were made to optimize dose and image quality. Published diagnostic reference levels were used as target values in this optimization. Initially, CR doses were the same as or higher than for film-screen, and the doses were lower for DR compared to film-screen. Subsequent clinical experience with the systems led to changes in the technique used for chest examinations both for CR and for DR. For CR, it was possible to change the algorithm and decrease the dose to one quarter of the initial value with acceptable image quality. For DR, it was decided to reduce noise by increasing the dose by a factor of two. No chang...Continue Reading

References

Nov 1, 1992·Australasian Radiology·S L NguC Collins
Feb 24, 1999·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·O H SuleimanD C Spelic
Feb 24, 1999·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·P C ShrimptonD Hart
Jun 10, 2000·Journal of Digital Imaging·P LeblansP Willems
Oct 24, 2000·Journal of Cancer Research and Clinical Oncology·M WeinmannM Bamberg
Feb 24, 2001·Medical Physics·E G ChristodoulouT W Hepburn
Sep 1, 1994·International Journal of Gynecological Cancer : Official Journal of the International Gynecological Cancer Society·K.S. TonkinJ. Powe
Mar 11, 2005·Radiology·Joel E GrayMartin J Yaffe
Feb 21, 2006·BJOG : an International Journal of Obstetrics and Gynaecology·G TurnerD Barlow

❮ Previous
Next ❯

Citations

May 7, 2011·Journal of Digital Imaging·Yogesh ThakurJohn E Aldrich
Jul 5, 2011·Journal of Digital Imaging·Menglong Zhang, Cunkun Chu
Feb 5, 2008·Radiation Protection Dosimetry·I A TsalafoutasE P Efstathopoulos
May 15, 2012·Canadian Association of Radiologists Journal = Journal L'Association Canadienne Des Radiologistes·Thorarin A BjarnasonJohn E Aldrich
Dec 6, 2011·Canadian Association of Radiologists Journal = Journal L'Association Canadienne Des Radiologistes·Elena TonkopiJeanne L Vanlarkin
Apr 7, 2009·European Journal of Radiology·Charles E Willis
Apr 23, 2016·Radiation Protection Dosimetry·Robert J CroppYogesh Thakur
Nov 20, 2018·Radiation Protection Dosimetry·Vasileios I MetaxasGeorge S Panayiotakis
Nov 25, 2020·Physics in Medicine and Biology·Lucas R BorgesPaulo M Azevedo-Marques
Mar 9, 2021·Radiation Protection Dosimetry·Chanchal KaushikMansi Chitkara
Jul 29, 2021·Radiation Protection Dosimetry·D AbbeyquayeB O Botwe

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Radiation Protection Dosimetry
A Schreiner-Karoussou
Canadian Association of Radiologists Journal = Journal L'Association Canadienne Des Radiologistes
Thorarin A BjarnasonJohn E Aldrich
© 2021 Meta ULC. All rights reserved