Effect of the high-pitch mode in dual-source computed tomography on the accuracy of three-dimensional volumetry of solid pulmonary nodules: A phantom study

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Abstract

Objective: To evaluate the influence of high-pitch mode (HPM) in dual-source computed tomography (DSCT) on the accuracy of three-dimensional (3D) volumetry for solid pulmonary nodules. Materials and Methods: A lung phantom implanted with 45 solid pulmonary nodules (n = 15 for each of 4-mm, 6-mm, and 8-mm in diameter) was scanned twice, first in conventional pitch mode (CPM) and then in HPM using DSCT. The relative percentage volume errors (RPEs) of 3D volumetry were compared between the HPM and CPM. In addition, the intermode volume variability (IVV) of 3D volumetry was calculated. Results: In the measurement of the 6-mm and 8-mm nodules, there was no significant difference in RPE (p > 0.05, respectively) between the CPM and HPM (IVVs of 1.2 ± 0.9%, and 1.7 ± 1.5%, respectively). In the measurement of the 4-mm nodules, the mean RPE in the HPM (35.1 ± 7.4%) was significantly greater (p < 0.01) than that in the CPM (18.4 ± 5.3%), with an IVV of 13.1 ± 6.6%. However, the IVVs were in an acceptable range (< 25%), regardless of nodule size. Conclusion: The accuracy of 3D volumetry with HPM for solid pulmonary nodule is comparable to that with CPM. However, the use of HPM may adversely affect the accuracy of 3D volumetry for smaller (< 5 mm in diameter) nodule.

Original languageEnglish
Pages (from-to)641-647
Number of pages7
JournalKorean Journal of Radiology
Volume16
Issue number3
DOIs
Publication statusPublished - 2015 Jan 1

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Keywords

  • Computed tomography
  • Computer generated 3D
  • Imaging phantom
  • Pulmonary nodule
  • Volumetric imaging

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

@article{9a2ae7ee2d334af5a7734bfcad492fec,
title = "Effect of the high-pitch mode in dual-source computed tomography on the accuracy of three-dimensional volumetry of solid pulmonary nodules: A phantom study",
abstract = "Objective: To evaluate the influence of high-pitch mode (HPM) in dual-source computed tomography (DSCT) on the accuracy of three-dimensional (3D) volumetry for solid pulmonary nodules. Materials and Methods: A lung phantom implanted with 45 solid pulmonary nodules (n = 15 for each of 4-mm, 6-mm, and 8-mm in diameter) was scanned twice, first in conventional pitch mode (CPM) and then in HPM using DSCT. The relative percentage volume errors (RPEs) of 3D volumetry were compared between the HPM and CPM. In addition, the intermode volume variability (IVV) of 3D volumetry was calculated. Results: In the measurement of the 6-mm and 8-mm nodules, there was no significant difference in RPE (p > 0.05, respectively) between the CPM and HPM (IVVs of 1.2 ± 0.9{\%}, and 1.7 ± 1.5{\%}, respectively). In the measurement of the 4-mm nodules, the mean RPE in the HPM (35.1 ± 7.4{\%}) was significantly greater (p < 0.01) than that in the CPM (18.4 ± 5.3{\%}), with an IVV of 13.1 ± 6.6{\%}. However, the IVVs were in an acceptable range (< 25{\%}), regardless of nodule size. Conclusion: The accuracy of 3D volumetry with HPM for solid pulmonary nodule is comparable to that with CPM. However, the use of HPM may adversely affect the accuracy of 3D volumetry for smaller (< 5 mm in diameter) nodule.",
keywords = "Computed tomography, Computer generated 3D, Imaging phantom, Pulmonary nodule, Volumetric imaging",
author = "Hwang, {Sung Ho} and Oh, {Yu Whan} and Ham, {Soo Youn} and Eun-Young Kang and Lee, {Ki Yeol}",
year = "2015",
month = "1",
day = "1",
doi = "10.3348/kjr.2015.16.3.641",
language = "English",
volume = "16",
pages = "641--647",
journal = "Korean Journal of Radiology",
issn = "1229-6929",
publisher = "Korean Radiological Society",
number = "3",

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TY - JOUR

T1 - Effect of the high-pitch mode in dual-source computed tomography on the accuracy of three-dimensional volumetry of solid pulmonary nodules

T2 - A phantom study

AU - Hwang, Sung Ho

AU - Oh, Yu Whan

AU - Ham, Soo Youn

AU - Kang, Eun-Young

AU - Lee, Ki Yeol

PY - 2015/1/1

Y1 - 2015/1/1

N2 - Objective: To evaluate the influence of high-pitch mode (HPM) in dual-source computed tomography (DSCT) on the accuracy of three-dimensional (3D) volumetry for solid pulmonary nodules. Materials and Methods: A lung phantom implanted with 45 solid pulmonary nodules (n = 15 for each of 4-mm, 6-mm, and 8-mm in diameter) was scanned twice, first in conventional pitch mode (CPM) and then in HPM using DSCT. The relative percentage volume errors (RPEs) of 3D volumetry were compared between the HPM and CPM. In addition, the intermode volume variability (IVV) of 3D volumetry was calculated. Results: In the measurement of the 6-mm and 8-mm nodules, there was no significant difference in RPE (p > 0.05, respectively) between the CPM and HPM (IVVs of 1.2 ± 0.9%, and 1.7 ± 1.5%, respectively). In the measurement of the 4-mm nodules, the mean RPE in the HPM (35.1 ± 7.4%) was significantly greater (p < 0.01) than that in the CPM (18.4 ± 5.3%), with an IVV of 13.1 ± 6.6%. However, the IVVs were in an acceptable range (< 25%), regardless of nodule size. Conclusion: The accuracy of 3D volumetry with HPM for solid pulmonary nodule is comparable to that with CPM. However, the use of HPM may adversely affect the accuracy of 3D volumetry for smaller (< 5 mm in diameter) nodule.

AB - Objective: To evaluate the influence of high-pitch mode (HPM) in dual-source computed tomography (DSCT) on the accuracy of three-dimensional (3D) volumetry for solid pulmonary nodules. Materials and Methods: A lung phantom implanted with 45 solid pulmonary nodules (n = 15 for each of 4-mm, 6-mm, and 8-mm in diameter) was scanned twice, first in conventional pitch mode (CPM) and then in HPM using DSCT. The relative percentage volume errors (RPEs) of 3D volumetry were compared between the HPM and CPM. In addition, the intermode volume variability (IVV) of 3D volumetry was calculated. Results: In the measurement of the 6-mm and 8-mm nodules, there was no significant difference in RPE (p > 0.05, respectively) between the CPM and HPM (IVVs of 1.2 ± 0.9%, and 1.7 ± 1.5%, respectively). In the measurement of the 4-mm nodules, the mean RPE in the HPM (35.1 ± 7.4%) was significantly greater (p < 0.01) than that in the CPM (18.4 ± 5.3%), with an IVV of 13.1 ± 6.6%. However, the IVVs were in an acceptable range (< 25%), regardless of nodule size. Conclusion: The accuracy of 3D volumetry with HPM for solid pulmonary nodule is comparable to that with CPM. However, the use of HPM may adversely affect the accuracy of 3D volumetry for smaller (< 5 mm in diameter) nodule.

KW - Computed tomography

KW - Computer generated 3D

KW - Imaging phantom

KW - Pulmonary nodule

KW - Volumetric imaging

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U2 - 10.3348/kjr.2015.16.3.641

DO - 10.3348/kjr.2015.16.3.641

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C2 - 25995695

AN - SCOPUS:84929314792

VL - 16

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EP - 647

JO - Korean Journal of Radiology

JF - Korean Journal of Radiology

SN - 1229-6929

IS - 3

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