Detection of focal hepatic lesions with spiral CT: Comparison of 4- and 8- mm interscan spacing

B. A. Urban, E. K. Fishman, J. E. Kuhlman, Akira Kawashima, J. G. Hennessey, S. S. Siegelman

Research output: Contribution to journalArticle

122 Citations (Scopus)

Abstract

OBJECTIVE. The objective of this study was to determine if spiral CT with 4-mm interscan spacing results in increased confidence in or rate of detection of focal hepatic lesions when compared with spiral CT with 8-mm interscan spacing. MATERIALS AND METHODS. Spiral CT scans of the liver of 42 consecutive patients with suspected hepatic disease were independently reviewed by three senior radiologists in two sets: one set was reconstructed with 8-mm interscan spacing and one set was reconstructed with 4-mm interscan spacing. The slice thickness was 8 mm for both data sets. The number and sizes of focal hepatic lesions were documented. RESULTS. Thirty-three of the 42 patients had least one focal lesion. The lesion size varied from 2 mm to 21 cm. When 8-mm interscan spacing was used, 297 lesions were detected (212 were considered definite). When 4-mm interscan spacing was used, 318 lesions were detected (258 were considered definite). Therefore, 7% more lesions were detected with 4-mm interscan spacing than with 8-mm interscan spacing (p = .05), and 22% more were diagnosed definitively (p < .01). If lesions larger than 4 cm are excluded, 10% more lesions were detected with 4-mm interscan spacing, and 33% more were diagnosed definitively. Of the lesions detected exclusively with 4-mm interscan spacing, 69% were less than 1.0 cm in diameter. CONCLUSION. Spiral CT with smaller interscan spacing (4 instead of 8 mm) results in increased confidence in and rate of detection of focal liver lesions. The additional benefit is most significant with smaller lesions.

Original languageEnglish (US)
Pages (from-to)783-785
Number of pages3
JournalAmerican Journal of Roentgenology
Volume160
Issue number4
DOIs
StatePublished - Jan 1 1993
Externally publishedYes

Fingerprint

Spiral Computed Tomography
Liver

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

Detection of focal hepatic lesions with spiral CT : Comparison of 4- and 8- mm interscan spacing. / Urban, B. A.; Fishman, E. K.; Kuhlman, J. E.; Kawashima, Akira; Hennessey, J. G.; Siegelman, S. S.

In: American Journal of Roentgenology, Vol. 160, No. 4, 01.01.1993, p. 783-785.

Research output: Contribution to journalArticle

Urban, B. A. ; Fishman, E. K. ; Kuhlman, J. E. ; Kawashima, Akira ; Hennessey, J. G. ; Siegelman, S. S. / Detection of focal hepatic lesions with spiral CT : Comparison of 4- and 8- mm interscan spacing. In: American Journal of Roentgenology. 1993 ; Vol. 160, No. 4. pp. 783-785.
@article{01a7bf2ed047438382bb770995ae00cf,
title = "Detection of focal hepatic lesions with spiral CT: Comparison of 4- and 8- mm interscan spacing",
abstract = "OBJECTIVE. The objective of this study was to determine if spiral CT with 4-mm interscan spacing results in increased confidence in or rate of detection of focal hepatic lesions when compared with spiral CT with 8-mm interscan spacing. MATERIALS AND METHODS. Spiral CT scans of the liver of 42 consecutive patients with suspected hepatic disease were independently reviewed by three senior radiologists in two sets: one set was reconstructed with 8-mm interscan spacing and one set was reconstructed with 4-mm interscan spacing. The slice thickness was 8 mm for both data sets. The number and sizes of focal hepatic lesions were documented. RESULTS. Thirty-three of the 42 patients had least one focal lesion. The lesion size varied from 2 mm to 21 cm. When 8-mm interscan spacing was used, 297 lesions were detected (212 were considered definite). When 4-mm interscan spacing was used, 318 lesions were detected (258 were considered definite). Therefore, 7{\%} more lesions were detected with 4-mm interscan spacing than with 8-mm interscan spacing (p = .05), and 22{\%} more were diagnosed definitively (p < .01). If lesions larger than 4 cm are excluded, 10{\%} more lesions were detected with 4-mm interscan spacing, and 33{\%} more were diagnosed definitively. Of the lesions detected exclusively with 4-mm interscan spacing, 69{\%} were less than 1.0 cm in diameter. CONCLUSION. Spiral CT with smaller interscan spacing (4 instead of 8 mm) results in increased confidence in and rate of detection of focal liver lesions. The additional benefit is most significant with smaller lesions.",
author = "Urban, {B. A.} and Fishman, {E. K.} and Kuhlman, {J. E.} and Akira Kawashima and Hennessey, {J. G.} and Siegelman, {S. S.}",
year = "1993",
month = "1",
day = "1",
doi = "10.2214/ajr.160.4.8456665",
language = "English (US)",
volume = "160",
pages = "783--785",
journal = "American Journal of Roentgenology",
issn = "0361-803X",
publisher = "American Roentgen Ray Society",
number = "4",

}

TY - JOUR

T1 - Detection of focal hepatic lesions with spiral CT

T2 - Comparison of 4- and 8- mm interscan spacing

AU - Urban, B. A.

AU - Fishman, E. K.

AU - Kuhlman, J. E.

AU - Kawashima, Akira

AU - Hennessey, J. G.

AU - Siegelman, S. S.

PY - 1993/1/1

Y1 - 1993/1/1

N2 - OBJECTIVE. The objective of this study was to determine if spiral CT with 4-mm interscan spacing results in increased confidence in or rate of detection of focal hepatic lesions when compared with spiral CT with 8-mm interscan spacing. MATERIALS AND METHODS. Spiral CT scans of the liver of 42 consecutive patients with suspected hepatic disease were independently reviewed by three senior radiologists in two sets: one set was reconstructed with 8-mm interscan spacing and one set was reconstructed with 4-mm interscan spacing. The slice thickness was 8 mm for both data sets. The number and sizes of focal hepatic lesions were documented. RESULTS. Thirty-three of the 42 patients had least one focal lesion. The lesion size varied from 2 mm to 21 cm. When 8-mm interscan spacing was used, 297 lesions were detected (212 were considered definite). When 4-mm interscan spacing was used, 318 lesions were detected (258 were considered definite). Therefore, 7% more lesions were detected with 4-mm interscan spacing than with 8-mm interscan spacing (p = .05), and 22% more were diagnosed definitively (p < .01). If lesions larger than 4 cm are excluded, 10% more lesions were detected with 4-mm interscan spacing, and 33% more were diagnosed definitively. Of the lesions detected exclusively with 4-mm interscan spacing, 69% were less than 1.0 cm in diameter. CONCLUSION. Spiral CT with smaller interscan spacing (4 instead of 8 mm) results in increased confidence in and rate of detection of focal liver lesions. The additional benefit is most significant with smaller lesions.

AB - OBJECTIVE. The objective of this study was to determine if spiral CT with 4-mm interscan spacing results in increased confidence in or rate of detection of focal hepatic lesions when compared with spiral CT with 8-mm interscan spacing. MATERIALS AND METHODS. Spiral CT scans of the liver of 42 consecutive patients with suspected hepatic disease were independently reviewed by three senior radiologists in two sets: one set was reconstructed with 8-mm interscan spacing and one set was reconstructed with 4-mm interscan spacing. The slice thickness was 8 mm for both data sets. The number and sizes of focal hepatic lesions were documented. RESULTS. Thirty-three of the 42 patients had least one focal lesion. The lesion size varied from 2 mm to 21 cm. When 8-mm interscan spacing was used, 297 lesions were detected (212 were considered definite). When 4-mm interscan spacing was used, 318 lesions were detected (258 were considered definite). Therefore, 7% more lesions were detected with 4-mm interscan spacing than with 8-mm interscan spacing (p = .05), and 22% more were diagnosed definitively (p < .01). If lesions larger than 4 cm are excluded, 10% more lesions were detected with 4-mm interscan spacing, and 33% more were diagnosed definitively. Of the lesions detected exclusively with 4-mm interscan spacing, 69% were less than 1.0 cm in diameter. CONCLUSION. Spiral CT with smaller interscan spacing (4 instead of 8 mm) results in increased confidence in and rate of detection of focal liver lesions. The additional benefit is most significant with smaller lesions.

UR - http://www.scopus.com/inward/record.url?scp=0027503076&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027503076&partnerID=8YFLogxK

U2 - 10.2214/ajr.160.4.8456665

DO - 10.2214/ajr.160.4.8456665

M3 - Article

C2 - 8456665

AN - SCOPUS:0027503076

VL - 160

SP - 783

EP - 785

JO - American Journal of Roentgenology

JF - American Journal of Roentgenology

SN - 0361-803X

IS - 4

ER -