Effects of adaptive section collimation on patient radiation dose in multisection spiral CT

Paul DeakWilli A Kalender


To evaluate the potential effectiveness of adaptive collimation in reducing computed tomographic (CT) radiation dose owing to z-overscanning by using dose measurements and Monte Carlo (MC) dose simulations. Institutional review board approval was not necessary. Dose profiles were measured with thermoluminescent dosimeters in CT dose index phantoms and in an Alderson-Rando phantom without and with adaptive section collimation for spiral cardiac and chest CT protocols and were compared with the MC simulated dose profiles. Additional dose measurements were performed with an ionization chamber for scan ranges of 5-50 cm and pitch factors of 0.5-1.5. The measured and simulated dose profiles agreed to within 3%. By using adaptive section collimation, a substantial dose reduction of up to 10% was achieved for cardiac and chest CT when measurements were performed free in air and of 7% on average when measurements were performed in phantoms. For scan ranges smaller than 12 cm, ionization chamber measurements and simulations indicated a dose reduction of up to 38%. Adaptive section collimation allows substantial reduction of unnecessary exposure owing to z-overscanning in spiral CT. It can be combined in synergy with other means of dose ...Continue Reading


May 8, 1998·Medical Physics·K Taguchi, H Aradate
Jun 2, 2000·IEEE Engineering in Medicine and Biology Magazine : the Quarterly Magazine of the Engineering in Medicine & Biology Society·W E SnyderC X Wang
Oct 4, 2000·IEEE Engineering in Medicine and Biology Magazine : the Quarterly Magazine of the Engineering in Medicine & Biology Society·T O FuchsW A Kalender
Jan 5, 2001·Journal of Radiological Protection : Official Journal of the Society for Radiological Protection·F A MettlerC A Kelsey
Apr 17, 2002·Pediatric Radiology·Edward Nickoloff
Oct 17, 2002·The British Journal of Radiology·A KhursheedB F Wall
Dec 10, 2002·RöFo : Fortschritte auf dem Gebiete der Röntgenstrahlen und der Nuklearmedizin·L W PollU Mödder
Apr 4, 2003·Medical Physics·Edward L NickoloffZheng F Lu
Apr 16, 2003·European Radiology·Mathias CohnenUlrich Mödder
Mar 12, 2008·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Willi A KalenderSylvia Wilharm
Apr 22, 2009·Medical Physics·Willi A KalenderSabrina V Vollmar

❮ Previous
Next ❯


Aug 24, 2011·Pediatric Radiology·Mahadevappa Mahesh
Dec 3, 2009·Skeletal Radiology·Paula J Richards, Jennifer George
Jul 1, 2009·European Radiology·Dirk ErtelWilli A Kalender
Jun 19, 2010·European Radiology·John DamilakisThomas M Link
Jun 10, 2011·European Radiology·Willi A KalenderMichaela C C Weigel
Oct 24, 2012·La Radiologia medica·G GuglielmiA Bazzocchi
Dec 23, 2009·Investigative Radiology·Wieland H SommerThorsten R C Johnson
Aug 7, 2012·Investigative Radiology·Thomas WernckeBernhard Christian Meyer
Aug 17, 2010·Journal of Thoracic Imaging·Marilyn J Siegel
Nov 2, 2011·International Journal of Clinical Practice. Supplement·P ApfaltrerJ W Nance
Mar 24, 2010·AJR. American Journal of Roentgenology·Cynthia H McColloughJames M Kofler
Nov 26, 2010·AJR. American Journal of Roentgenology·Wieland H SommerKonstatin Nikolaou
Apr 27, 2013·AJR. American Journal of Roentgenology·Claudia ZachariasMahesh M Thapa
Nov 23, 2013·AJR. American Journal of Roentgenology·Raoul M S JoemaiJacob Geleijns
Jul 5, 2012·Medical Physics·Wei ChenWilli A Kalender
Sep 21, 2013·European Journal of Nuclear Medicine and Molecular Imaging·Gunnar BrixDietmar Noßke
Jun 22, 2014·AJR. American Journal of Roentgenology·Touko KaasalainenMika Kortesniemi
Jun 11, 2010·Pediatric Radiology·Rutger A J NievelsteinAart J van der Molen
Jul 30, 2014·European Journal of Radiology·Takeshi KuboHiroto Hatabu
Jul 11, 2014·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Diego TrevisanAldo Valentini
Oct 12, 2014·Pediatric Radiology·Donald P Frush
Nov 26, 2009·Emergency Radiology·Martin L D Gunn, Jennifer R Kohr
Aug 24, 2012·Der Radiologe·M S MayB Schmidt
May 20, 2011·Health Physics·Stefan UlzheimerThomas Flohr
Apr 24, 2013·Canadian Association of Radiologists Journal = Journal L'Association Canadienne Des Radiologistes·Aaron Sodickson
May 4, 2012·Journal of Cardiovascular Computed Tomography·Sandra HalliburtonWm Guy Weigold
Nov 22, 2011·Radiologic Clinics of North America·Aaron Sodickson
Sep 6, 2011·Radiologic Clinics of North America·Hyun Woo Goo
May 21, 2011·European Journal of Radiology·Laurence BeelsHubert Thierens
Jul 9, 2010·Radiologic Clinics of North America·John Damilakis, Giuseppe Guglielmi
Jul 9, 2010·Radiologic Clinics of North America·Kanako K KumamaruFrank J Rybicki

❮ Previous
Next ❯

Related Concepts

Trending Feeds


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 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.


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.