Characterization of adrenal adenomas and metastases: Correlation between unenhanced computed tomography and chemical shift magnetic resonance imaging

G. Rescinito, F. Zandrino, G. Cittadini, E. Santacroce, V. Giasotto, C. E. Neumaier

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: To evaluate the correlation of absolute attenuation values of unenhanced computed tomography (CT) with signal intensity (SI) quantitative analysis on chemical shift (CS) magnetic resonance (MR) imaging in differentiating adrenal adenomas from metastases. Material and Methods: Forty-one adrenal masses (27 adenomas, 14 metastases) were studied with CS MR imaging and unenhanced CT. MR included T1-weighted breathhold gradient-echo in-phase (IP) and opposed-phase (OP) sequences. The SI index (Sl-i) [(SI IP-SIOP/SIIP)] × 100% and chemical-shift ratio (CS-r) relative to the spleen [(SIlesion/ SI spleen)OP/(SIlesion/SIspleen])IP] were calculated for each lesion. CT absolute attenuation values were also determined. Results: The mean attenuation value of metastases was significantly greater than that of adenomas (<0.0001). On MR, the mean SI-i of adenomas was significantly greater than that of metastases (P

Original languageEnglish
Pages (from-to)71-76
Number of pages6
JournalActa Radiologica
Volume47
Issue number1
DOIs
Publication statusPublished - Feb 1 2006

Keywords

  • Adrenal mass
  • Chemical shift imaging
  • Computed tomography (CT)
  • Magnetic resonance (MR)

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

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