PMID- 21330975
OWN - NLM
STAT- MEDLINE
DCOM- 20110601
LR  - 20211020
IS  - 1526-9914 (Electronic)
IS  - 1526-9914 (Linking)
VI  - 12
IP  - 1
DP  - 2010 Dec 4
TI  - Evaluation and commissioning of a surface based system for respiratory sensing in 
      4D CT.
PG  - 3288
AB  - The purpose of this study is to assess the temporal and reconstruction accuracy 
      of a surface imaging system, the GateCT under ideal conditions, and compare the 
      device with a commonly used respiratory surrogate: the Varian RPM. A clinical CT 
      scanner, run in cine mode, was used with two optical devices, GateCT and RPM, to 
      detect respiratory motion. A radiation detector, GM-10, triggers the X-ray on/off 
      to GateCT system, while the RPM is directly synchronized with the CT scanner 
      through an electronic connection. Two phantoms were imaged: the first phantom 
      translated on a rigid plate along the anterior-posterior (AP) direction, and was 
      used to assess the temporal synchronization of each optical system with the CT 
      scanner. The second phantom, consisting of five spheres translating 3 cm 
      peak-to-peak in the superior-inferior direction, was used to assess the quality 
      of rebinned images created by GateCT and RPM. Calibration assessment showed a 
      nearly perfect synchronization with the scanner for both the RPM and GateCT 
      systems, thus demonstrating the good performance of the radiation detector. 
      Results for the volume rebinning test showed discrepancies in volumes for the 3D 
      reconstruction (compared to ground truth) of up to 36% for GateCT and up to 40% 
      for RPM. No statistical difference was proven between the two systems in volume 
      sorting. Errors are mainly due to phase detection inaccuracies and to the large 
      motion of the phantom. This feasibility study assessed the consistency of two 
      optical systems in synchronizing the respiratory signal with the image 
      acquisition. A new patient protocol based on both RPM and GateCT will be soon 
      started.
FAU - Spadea, Maria Francesca
AU  - Spadea MF
AD  - Department of Experimental and Clinical Medicine, Magna Graecia University viale 
      Europa, Catanzaro, Italy. mfspadea@unicz.it
FAU - Baroni, Guido
AU  - Baroni G
FAU - Gierga, David P
AU  - Gierga DP
FAU - Turcotte, Julie C
AU  - Turcotte JC
FAU - Chen, George T Y
AU  - Chen GT
FAU - Sharp, Gregory C
AU  - Sharp GC
LA  - eng
PT  - Evaluation Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20101204
PL  - United States
TA  - J Appl Clin Med Phys
JT  - Journal of applied clinical medical physics
JID - 101089176
SB  - IM
MH  - Artifacts
MH  - Four-Dimensional Computed Tomography/instrumentation/*methods
MH  - Humans
MH  - Imaging, Three-Dimensional
MH  - Motion
MH  - Phantoms, Imaging
MH  - Reproducibility of Results
MH  - Respiratory Mechanics
MH  - Respiratory-Gated Imaging Techniques/*methods
MH  - Sensitivity and Specificity
MH  - Time Factors
PMC - PMC5718580
EDAT- 2011/02/19 06:00
MHDA- 2011/06/02 06:00
PMCR- 2010/12/04
CRDT- 2011/02/19 06:00
PHST- 2010/02/13 00:00 [received]
PHST- 2010/08/19 00:00 [accepted]
PHST- 2010/09/08 00:00 [revised]
PHST- 2011/02/19 06:00 [entrez]
PHST- 2011/02/19 06:00 [pubmed]
PHST- 2011/06/02 06:00 [medline]
PHST- 2010/12/04 00:00 [pmc-release]
AID - ACM20162 [pii]
AID - 10.1120/jacmp.v12i1.3288 [doi]
PST - epublish
SO  - J Appl Clin Med Phys. 2010 Dec 4;12(1):3288. doi: 10.1120/jacmp.v12i1.3288.