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Article: Magnetic resonance for T-staging of nasopharyngeal carcinoma - The most informative pair of sequences

TitleMagnetic resonance for T-staging of nasopharyngeal carcinoma - The most informative pair of sequences
Authors
KeywordsStaging
Magnetic resonance imaging
Nasopharyngeal carcinoma
Issue Date2004
Citation
Japanese Journal of Clinical Oncology, 2004, v. 34, n. 4, p. 171-175 How to Cite?
AbstractObjective: To evaluate the most informative pair of sequences in magnetic resonance (MR) for T-staging of nasopharyngeal carcinoma (NPC). Methods: The MR images of 134 patients with newly diagnosed NPC, from 1 996 to 2002, were retrospectively reviewed. All the patients were scanned using 1.5 Tesla MR systems. The images of the nasopharynx were reviewed by two qualified radiologists to determine the positive findings and the T-stage by UICC (6th edition) System, using each sequence separately. The T-stage derived from a single MR sequence was then compared with the T-stage based on the five selected sequences to assess the number and percentage of patients who were being understaged. Therefore, the overall percentage accuracy of each single sequence could be determined. A pair of sequences providing information to achieve almost 100% diagnostic accuracy was then derived. Results: The overall percentage accuracy of five individual sequences of the nasopharynx is as follows: Contrast-enhanced (CE) fat suppression (FS) axial T1 (94.8%), CE FS coronal T1 (88.1%), FS axial T2 (85.8%), non-contrast enhanced (NE) axial T1 (78.4%) and non-contrast enhanced (NE) coronal T1 (77.6%). CE FS axial T1 has the best accuracy. All the structures that are missed in CE FS axial T1, which lead to apparent understaging, are appreciated in NE axial T1-weighted images. Conclusion: Individual sequences supplement each other in the NPC staging. CE FS axial T1 is the most informative individual sequence. Combination of CE FS axial T1 and NE axial T1 of the nasopharynx provides sufficient information to achieve almost 100% diagnostic accuracy in T-staging; therefore, both should be included in the MR-staging protocol. © 2004 Foundation for Promotion of Cancer Research.
Persistent Identifierhttp://hdl.handle.net/10722/213892
ISSN
2015 Impact Factor: 1.889
2015 SCImago Journal Rankings: 0.847

 

DC FieldValueLanguage
dc.contributor.authorLau, Kam Y.-
dc.contributor.authorKan, Wai K.-
dc.contributor.authorSze, Wai M.-
dc.contributor.authorLee, Anne W M-
dc.contributor.authorChan, John K W-
dc.contributor.authorYau, Tsz K.-
dc.contributor.authorYeung, Rebecca M.-
dc.contributor.authorTan, Lawrence T H-
dc.contributor.authorChan, Ping O.-
dc.contributor.authorLee, Alex S L-
dc.date.accessioned2015-08-19T13:41:07Z-
dc.date.available2015-08-19T13:41:07Z-
dc.date.issued2004-
dc.identifier.citationJapanese Journal of Clinical Oncology, 2004, v. 34, n. 4, p. 171-175-
dc.identifier.issn0368-2811-
dc.identifier.urihttp://hdl.handle.net/10722/213892-
dc.description.abstractObjective: To evaluate the most informative pair of sequences in magnetic resonance (MR) for T-staging of nasopharyngeal carcinoma (NPC). Methods: The MR images of 134 patients with newly diagnosed NPC, from 1 996 to 2002, were retrospectively reviewed. All the patients were scanned using 1.5 Tesla MR systems. The images of the nasopharynx were reviewed by two qualified radiologists to determine the positive findings and the T-stage by UICC (6th edition) System, using each sequence separately. The T-stage derived from a single MR sequence was then compared with the T-stage based on the five selected sequences to assess the number and percentage of patients who were being understaged. Therefore, the overall percentage accuracy of each single sequence could be determined. A pair of sequences providing information to achieve almost 100% diagnostic accuracy was then derived. Results: The overall percentage accuracy of five individual sequences of the nasopharynx is as follows: Contrast-enhanced (CE) fat suppression (FS) axial T1 (94.8%), CE FS coronal T1 (88.1%), FS axial T2 (85.8%), non-contrast enhanced (NE) axial T1 (78.4%) and non-contrast enhanced (NE) coronal T1 (77.6%). CE FS axial T1 has the best accuracy. All the structures that are missed in CE FS axial T1, which lead to apparent understaging, are appreciated in NE axial T1-weighted images. Conclusion: Individual sequences supplement each other in the NPC staging. CE FS axial T1 is the most informative individual sequence. Combination of CE FS axial T1 and NE axial T1 of the nasopharynx provides sufficient information to achieve almost 100% diagnostic accuracy in T-staging; therefore, both should be included in the MR-staging protocol. © 2004 Foundation for Promotion of Cancer Research.-
dc.languageeng-
dc.relation.ispartofJapanese Journal of Clinical Oncology-
dc.subjectStaging-
dc.subjectMagnetic resonance imaging-
dc.subjectNasopharyngeal carcinoma-
dc.titleMagnetic resonance for T-staging of nasopharyngeal carcinoma - The most informative pair of sequences-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1093/jjco/hyh033-
dc.identifier.pmid15121751-
dc.identifier.scopuseid_2-s2.0-18344413352-
dc.identifier.hkuros266595-
dc.identifier.volume34-
dc.identifier.issue4-
dc.identifier.spage171-
dc.identifier.epage175-
dc.identifier.eissn1465-3621-

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