Volume-of-interest (VOI) imaging in C-arm flat-detector CT for high image quality at reduced dose

Medical Physics
D KolditzW A Kalender

Abstract

A novel method for flat-detector computed tomography was developed to enable volume-of-interest (VOI) imaging at high resolution, low noise, and reduced dose. For this, a full low-dose overview (OV) scan and a local high-dose scan of a VOI are combined. The first scan yields an overview of the whole object and enables the selection of an arbitrary VOI. The second scan of that VOI assures high image quality within the interesting volume. The combination of the two consecutive scans is based on a forward projection of the reconstructed OV volume that was registered to the VOI. The artificial projection data of the OV scan are combined with the measured VOI data in the raw data domain. Different projection values are matched by an appropriate transformation and weighting. The reconstruction is performed with a standard Feldkamp-type algorithm. In simulations, the combination of OV scan and VOI scan was investigated on a mathematically described phantom. In measurements, spatial resolution and noise were evaluated with image quality phantoms. Modulation transfer functions and noise values were calculated. Measurements of an anthropomorphic head phantom were used to validate the proposed method for realistic applications, e.g., imag...Continue Reading

References

Mar 1, 1982·Medical Physics·D L Parker
Apr 1, 1997·IEEE Transactions on Medical Imaging·F MaesP Suetens
Jul 20, 2002·International Journal of Radiation Oncology, Biology, Physics·David A JaffrayAlvaro A Martinez
Oct 9, 2004·Physics in Medicine and Biology·Frédéric NooJed D Pack
Oct 19, 2004·Medical Physics·J HsiehT J Myers
Feb 11, 2005·European Radiology·K SourbelleW A Kalender
Aug 10, 2005·Academic Radiology·Jens WiegertGeorg Rose
Jun 26, 2007·European Radiology·Willi A Kalender, Yiannis Kyriakou
Nov 8, 2007·Medical Physics·Baojun LiJiang Hsieh
Jan 17, 2008·Medical Physics·Seungryong ChoXiaochuan Pan
Jan 1, 1982·IEEE Transactions on Medical Imaging·P M Joseph
Jun 17, 2008·Physics in Medicine and Biology·Yiannis KyriakouWilli A Kalender
Aug 9, 2008·AJNR. American Journal of Neuroradiology·Y KyriakouW A Kalender
Jan 30, 2009·Medical Physics·Stefan HoppeFrédéric Noo
Apr 17, 2009·Physics in Medicine and Biology·Hengyong Yu, Ge Wang
Oct 9, 2009·Medical Physics·Lingyun ChenChris C Shaw
Mar 17, 2010·Medical Physics·Sebastian SchaferKenneth R Hoffmann
Jun 21, 2012·Physics in Medicine and Biology·Zhicong YuJoachim Hornegger

❮ Previous
Next ❯

Citations

Jun 10, 2011·European Radiology·Willi A KalenderMichaela C C Weigel
Mar 12, 2013·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·Esmaeil Enjilela, Esam M A Hussein
Aug 6, 2011·Medical Physics·Clemens MaassMarc Kachelriess
Dec 11, 2013·Medical Physics·Steven Bartolac, David Jaffray
Jan 7, 2014·Medical Physics·Del Leary, James L Robar
Oct 21, 2015·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)·Timo KiljunenMika Kortesniemi
Oct 24, 2015·AJNR. American Journal of Neuroradiology·P YangC Strother
Apr 4, 2015·Medical Physics·Timothy P Szczykutowicz, James Hermus
May 11, 2016·Journal of X-ray Science and Technology·Hao GongGuohua Cao
Aug 16, 2016·International Journal of Biomedical Imaging·Johannes RauschChristian Riess
Jan 11, 2017·World Journal of Radiology·Stephen P PowerMichael M Maher
Sep 14, 2017·Medical Physics·Aymeric ReshefIsabelle Bloch
Aug 6, 2013·Physics in Medicine and Biology·Ge Wang, Hengyong Yu
Jul 25, 2018·Journal of X-ray Science and Technology·Qian WangHengyong Yu
Feb 22, 2014·Physics in Medicine and Biology·T P Szczykutowicz, C A Mistretta
Sep 9, 2015·Physics in Medicine and Biology·Timothy P SzczykutowiczJennifer Smilowitz
May 23, 2018·Journal of Applied Clinical Medical Physics·Thomas C LarsenHan Wen
Aug 15, 2013·Physics in Medicine and Biology·Frank Dennerlein, Andreas Maier
Sep 19, 2019·Journal of Medical Imaging·Wenying WangJ Webster Stayman
Mar 1, 2019··Joseph W. StaymanGrace J. Gang

❮ 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.