Phase versus amplitude sorting of 4D-CT data

Nicole M. Wink, Christoph Panknin, Timothy D. Solberg

Research output: Contribution to journalArticle

118 Citations (Scopus)

Abstract

Image quality of CT scans suffers when objects undergo motion. Respiratory motion causes artifacts, which prevents adequate visualization of anatomy. Four-dimensional CT (4D-CT) is a method in which image reconstruction of moving objects is retrospectively gated according to the recorded phase information of the monitored motion pattern. Although several groups have investigated the use of 4D-CT in radiotherapy, little has been detailed with regard to the sorting method. We present a new retrospective gating technique with sorting based on the amplitude of the motion trace. This method is compared to previously developed methods that sort based on phase. A 16-slice CT scanner (Sensation 16, Siemens Medical Solutions, Erlangen, Germany) was used to acquire images of two phantoms on a motion platform moving in two dimensions. The motion was monitored using a strain gauge inserted inside an adjustable belt. A 180° interpolation was used for reconstruction after gating. Significant improvement using the amplitude-sorting technique was observed, particularly when testing nonperiodic motion functions.

Original languageEnglish (US)
Pages (from-to)77-85
Number of pages9
JournalJournal of Applied Clinical Medical Physics
Volume7
Issue number1
DOIs
StatePublished - Dec 2006

Fingerprint

Four-Dimensional Computed Tomography
classifying
Sorting
Computerized tomography
Radiotherapy
Strain gages
Image reconstruction
Image quality
Interpolation
Visualization
Testing
Computer-Assisted Image Processing
anatomy
strain gages
image reconstruction
Germany
Artifacts
scanners
interpolation
artifacts

Keywords

  • 4D-CT
  • Computed tomography
  • Gated radiotherapy
  • RCCT
  • Respiratory motion

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiation
  • Instrumentation

Cite this

Phase versus amplitude sorting of 4D-CT data. / Wink, Nicole M.; Panknin, Christoph; Solberg, Timothy D.

In: Journal of Applied Clinical Medical Physics, Vol. 7, No. 1, 12.2006, p. 77-85.

Research output: Contribution to journalArticle

Wink, Nicole M. ; Panknin, Christoph ; Solberg, Timothy D. / Phase versus amplitude sorting of 4D-CT data. In: Journal of Applied Clinical Medical Physics. 2006 ; Vol. 7, No. 1. pp. 77-85.
@article{62cd2b162ac24d98a94a969499155bcc,
title = "Phase versus amplitude sorting of 4D-CT data",
abstract = "Image quality of CT scans suffers when objects undergo motion. Respiratory motion causes artifacts, which prevents adequate visualization of anatomy. Four-dimensional CT (4D-CT) is a method in which image reconstruction of moving objects is retrospectively gated according to the recorded phase information of the monitored motion pattern. Although several groups have investigated the use of 4D-CT in radiotherapy, little has been detailed with regard to the sorting method. We present a new retrospective gating technique with sorting based on the amplitude of the motion trace. This method is compared to previously developed methods that sort based on phase. A 16-slice CT scanner (Sensation 16, Siemens Medical Solutions, Erlangen, Germany) was used to acquire images of two phantoms on a motion platform moving in two dimensions. The motion was monitored using a strain gauge inserted inside an adjustable belt. A 180° interpolation was used for reconstruction after gating. Significant improvement using the amplitude-sorting technique was observed, particularly when testing nonperiodic motion functions.",
keywords = "4D-CT, Computed tomography, Gated radiotherapy, RCCT, Respiratory motion",
author = "Wink, {Nicole M.} and Christoph Panknin and Solberg, {Timothy D.}",
year = "2006",
month = "12",
doi = "10.1120/jacmp.2027.25373",
language = "English (US)",
volume = "7",
pages = "77--85",
journal = "Journal of Applied Clinical Medical Physics",
issn = "1526-9914",
publisher = "American Institute of Physics Publising LLC",
number = "1",

}

TY - JOUR

T1 - Phase versus amplitude sorting of 4D-CT data

AU - Wink, Nicole M.

AU - Panknin, Christoph

AU - Solberg, Timothy D.

PY - 2006/12

Y1 - 2006/12

N2 - Image quality of CT scans suffers when objects undergo motion. Respiratory motion causes artifacts, which prevents adequate visualization of anatomy. Four-dimensional CT (4D-CT) is a method in which image reconstruction of moving objects is retrospectively gated according to the recorded phase information of the monitored motion pattern. Although several groups have investigated the use of 4D-CT in radiotherapy, little has been detailed with regard to the sorting method. We present a new retrospective gating technique with sorting based on the amplitude of the motion trace. This method is compared to previously developed methods that sort based on phase. A 16-slice CT scanner (Sensation 16, Siemens Medical Solutions, Erlangen, Germany) was used to acquire images of two phantoms on a motion platform moving in two dimensions. The motion was monitored using a strain gauge inserted inside an adjustable belt. A 180° interpolation was used for reconstruction after gating. Significant improvement using the amplitude-sorting technique was observed, particularly when testing nonperiodic motion functions.

AB - Image quality of CT scans suffers when objects undergo motion. Respiratory motion causes artifacts, which prevents adequate visualization of anatomy. Four-dimensional CT (4D-CT) is a method in which image reconstruction of moving objects is retrospectively gated according to the recorded phase information of the monitored motion pattern. Although several groups have investigated the use of 4D-CT in radiotherapy, little has been detailed with regard to the sorting method. We present a new retrospective gating technique with sorting based on the amplitude of the motion trace. This method is compared to previously developed methods that sort based on phase. A 16-slice CT scanner (Sensation 16, Siemens Medical Solutions, Erlangen, Germany) was used to acquire images of two phantoms on a motion platform moving in two dimensions. The motion was monitored using a strain gauge inserted inside an adjustable belt. A 180° interpolation was used for reconstruction after gating. Significant improvement using the amplitude-sorting technique was observed, particularly when testing nonperiodic motion functions.

KW - 4D-CT

KW - Computed tomography

KW - Gated radiotherapy

KW - RCCT

KW - Respiratory motion

UR - http://www.scopus.com/inward/record.url?scp=33645395992&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33645395992&partnerID=8YFLogxK

U2 - 10.1120/jacmp.2027.25373

DO - 10.1120/jacmp.2027.25373

M3 - Article

C2 - 16518319

AN - SCOPUS:33645395992

VL - 7

SP - 77

EP - 85

JO - Journal of Applied Clinical Medical Physics

JF - Journal of Applied Clinical Medical Physics

SN - 1526-9914

IS - 1

ER -