Abstract
Objective: We developed a new volume rendering technique, the CT gastrography wall carving image (WC) technique, which provides a clear visualization of localized enhanced tumors in the gastric wall. We evaluated the diagnostic performance of the WC as an adjunct to conventional images in detecting early gastric cancer (EGC). Materials and methods: Thirty-nine patients with 43 EGCs underwent contrast-enhanced MDCT gastrography for preoperative examination. Two observers independently reviewed the images under three different conditions: term 1, Axial CT; term 2, Axial CT, MPR and VE; and term 3, Axial CT, MPR, VE and WC for the detection of EGC. The accuracy of each condition as reviewed by each of the two observers was evaluated by receiver operating characteristic analysis. Interobserver agreement was calculated using weighted-κ statistics. Results: The best diagnostic performance and interobserver agreement were obtained in term 3. The AUCs of the two observers for terms 1, 2, and 3 were 0.63, 0.73, and 0.84, and 0.57, 0.73, and 0.76, respectively. The interobserver agreement improved from fair at term 1 to substantial at term 3. Conclusions: The addition of WC to conventional MDCT display improved the diagnostic accuracy and interobserver reproducibility for the detection of ECG. WC represents a suitable alternative for the visualization of localized enhanced tumors in the gastric wall.
| Original language | English |
|---|---|
| Pages (from-to) | 1695-1701 |
| Number of pages | 7 |
| Journal | European Journal of Radiology |
| Volume | 81 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Aug 1 2012 |
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All Science Journal Classification (ASJC) codes
- Radiology Nuclear Medicine and imaging
Cite this
Contrast-enhanced MDCT gastrography for detection of early gastric cancer : Initial assessment of "wall-carving image", a novel volume rendering technique. / Komori, Masahiro; Kawanami, Satoshi; Tsurumaru, Daisuke; Matsuura, Shuji; Hiraka, Kiyohisa; Nishie, Akihiro; Honda, Hiroshi.
In: European Journal of Radiology, Vol. 81, No. 8, 01.08.2012, p. 1695-1701.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Contrast-enhanced MDCT gastrography for detection of early gastric cancer
T2 - Initial assessment of "wall-carving image", a novel volume rendering technique
AU - Komori, Masahiro
AU - Kawanami, Satoshi
AU - Tsurumaru, Daisuke
AU - Matsuura, Shuji
AU - Hiraka, Kiyohisa
AU - Nishie, Akihiro
AU - Honda, Hiroshi
PY - 2012/8/1
Y1 - 2012/8/1
N2 - Objective: We developed a new volume rendering technique, the CT gastrography wall carving image (WC) technique, which provides a clear visualization of localized enhanced tumors in the gastric wall. We evaluated the diagnostic performance of the WC as an adjunct to conventional images in detecting early gastric cancer (EGC). Materials and methods: Thirty-nine patients with 43 EGCs underwent contrast-enhanced MDCT gastrography for preoperative examination. Two observers independently reviewed the images under three different conditions: term 1, Axial CT; term 2, Axial CT, MPR and VE; and term 3, Axial CT, MPR, VE and WC for the detection of EGC. The accuracy of each condition as reviewed by each of the two observers was evaluated by receiver operating characteristic analysis. Interobserver agreement was calculated using weighted-κ statistics. Results: The best diagnostic performance and interobserver agreement were obtained in term 3. The AUCs of the two observers for terms 1, 2, and 3 were 0.63, 0.73, and 0.84, and 0.57, 0.73, and 0.76, respectively. The interobserver agreement improved from fair at term 1 to substantial at term 3. Conclusions: The addition of WC to conventional MDCT display improved the diagnostic accuracy and interobserver reproducibility for the detection of ECG. WC represents a suitable alternative for the visualization of localized enhanced tumors in the gastric wall.
AB - Objective: We developed a new volume rendering technique, the CT gastrography wall carving image (WC) technique, which provides a clear visualization of localized enhanced tumors in the gastric wall. We evaluated the diagnostic performance of the WC as an adjunct to conventional images in detecting early gastric cancer (EGC). Materials and methods: Thirty-nine patients with 43 EGCs underwent contrast-enhanced MDCT gastrography for preoperative examination. Two observers independently reviewed the images under three different conditions: term 1, Axial CT; term 2, Axial CT, MPR and VE; and term 3, Axial CT, MPR, VE and WC for the detection of EGC. The accuracy of each condition as reviewed by each of the two observers was evaluated by receiver operating characteristic analysis. Interobserver agreement was calculated using weighted-κ statistics. Results: The best diagnostic performance and interobserver agreement were obtained in term 3. The AUCs of the two observers for terms 1, 2, and 3 were 0.63, 0.73, and 0.84, and 0.57, 0.73, and 0.76, respectively. The interobserver agreement improved from fair at term 1 to substantial at term 3. Conclusions: The addition of WC to conventional MDCT display improved the diagnostic accuracy and interobserver reproducibility for the detection of ECG. WC represents a suitable alternative for the visualization of localized enhanced tumors in the gastric wall.
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UR - http://www.scopus.com/inward/citedby.url?scp=84864440657&partnerID=8YFLogxK
U2 - 10.1016/j.ejrad.2011.04.046
DO - 10.1016/j.ejrad.2011.04.046
M3 - Article
C2 - 21620599
AN - SCOPUS:84864440657
VL - 81
SP - 1695
EP - 1701
JO - European Journal of Radiology
JF - European Journal of Radiology
SN - 0720-048X
IS - 8
ER -