Ct evaluation of mediastinal lymphadenopathy

Noncontrast 5 mm vs postcontrast 10 mm sections

Linda B. Haramati, Alicia M. Cartagena, John H M Austin

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Objective: Two CT techniques were compared in the assessment of mediastinal lymph nodes: 5 mm thick sections without intravenous contrast medium and 10 mm thick sections with intravenous contrast medium. Materials and Methods: Seventy-nine adult patients were examined by chest CT. From the level of the aortic arch through the level of the right middle lobe bronchus 5 mm thick sections were performed without intravenous contrast medium, followed by 10 mm thick sections of the same region with intravenous contrast medium. Two chest radiologists separately reviewed each CT method for each patient. Mediastinal lymph nodes were localized according to the American Thoracic Society scheme. Lymph node diameter was measured on the short axis. Results: The 5 mm thick noncontrast sections permitted identification of more mediastinal lymph nodes than the 10 mm thick contrast enhanced sections (p <0.01, signed rank test). The 5 mm thick unenhanced sections tended to show slightly (1-2 mm) larger nodes than the 10 mm thick contrast enhanced sections (stations 7, 10R, both reviewers, p <0.05, signed rank test). Nodes with a short axis diameter 5=8 mm were identified comparably well using either CT technique. Conclusion: The present study indicates that CT of the mediastinum using 5 mm thick sections, without intravenous contrast medium, is an appropriate scanning technique for evaluation of mediastinal lymphadenopathy.

Original languageEnglish (US)
Pages (from-to)375-378
Number of pages4
JournalJournal of Computer Assisted Tomography
Volume19
Issue number3
StatePublished - 1995

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Contrast Media
Lymph Nodes
Thorax
Mediastinum
Bronchi
Thoracic Aorta
Lymphadenopathy

Keywords

  • Computed tomography, techniques
  • Lymphadenopathy
  • Mediastinum
  • Mediastinum, neoplasms

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Cite this

Ct evaluation of mediastinal lymphadenopathy : Noncontrast 5 mm vs postcontrast 10 mm sections. / Haramati, Linda B.; Cartagena, Alicia M.; Austin, John H M.

In: Journal of Computer Assisted Tomography, Vol. 19, No. 3, 1995, p. 375-378.

Research output: Contribution to journalArticle

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AB - Objective: Two CT techniques were compared in the assessment of mediastinal lymph nodes: 5 mm thick sections without intravenous contrast medium and 10 mm thick sections with intravenous contrast medium. Materials and Methods: Seventy-nine adult patients were examined by chest CT. From the level of the aortic arch through the level of the right middle lobe bronchus 5 mm thick sections were performed without intravenous contrast medium, followed by 10 mm thick sections of the same region with intravenous contrast medium. Two chest radiologists separately reviewed each CT method for each patient. Mediastinal lymph nodes were localized according to the American Thoracic Society scheme. Lymph node diameter was measured on the short axis. Results: The 5 mm thick noncontrast sections permitted identification of more mediastinal lymph nodes than the 10 mm thick contrast enhanced sections (p <0.01, signed rank test). The 5 mm thick unenhanced sections tended to show slightly (1-2 mm) larger nodes than the 10 mm thick contrast enhanced sections (stations 7, 10R, both reviewers, p <0.05, signed rank test). Nodes with a short axis diameter 5=8 mm were identified comparably well using either CT technique. Conclusion: The present study indicates that CT of the mediastinum using 5 mm thick sections, without intravenous contrast medium, is an appropriate scanning technique for evaluation of mediastinal lymphadenopathy.

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