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Başlık: Value of chemical shift subtraction MRI in characterization of adrenal masses
Yazarlar: Uludağ Üniversitesi/Tıp Fakültesi/Radyoloji Anabilim Dalı.
Uludağ Üniversitesi/Tıp Fakültesi/Biyoistatistik Anabilim Dalı.
Savcı, Gürsel
Yazıcı, Zeynep
Şahin, Neslin
Akgöz, Semra
Tuncel, Ercan
AAI-2303-2021
AAH-5481-2021
Anahtar kelimeler: Radiology, nuclear medicine & medical imaging
MRI technique
MRI
Genitourinary tract imaging
Adrenal gland
Abdomen
CT
Tumors
Benign
Distinction
Differentiation
Adenomas
Yayın Tarihi: 2006
Yayıncı: Amer Roentgen Ray Soc
Atıf: Savcı, G. vd. (2006). ''Value of chemical shift subtraction MRI in characterization of adrenal masses''. American Journal of Roentgenology, 186(1), 130-135.
Özet: OBJECTIVE. ne purpose of this study was to assess the advantages of the image subtraction technique in chemical shift MRI for the differentiation of adrenal adenomas from nonadenomas. SUBJECTS AND METHODS. Thirty-five patients with 42 adrenal masses (eight metastases and 34 nonfunctioning adenomas) underwent chemical shift MRI using a double-echo fast low-angle shot sequence. Subsequently, opposed-phase chemical shift MR images were subtracted from in-phase images, The subtraction images were assessed quantitatively and qualitatively. For quantitative assessment, the signal intensity values of the adrenal masses were measured by one investigator with manually defined regions of interest. Qualitative assessment of the subtraction images was performed independently by two investigators, who reported their confidence in diagnosing adenomas versus nonadenomas based on signal intensity of the adrenal masses on subtraction images. RESULTS. The mean signal intensities were significantly different between adenomas and metastases on subtraction images (213 vs 18: p < 0.0001). There was no overlap in signal intensities between adenomas and metastatic tumors, The accuracy in distinguishing adenomas from metastatic tumors was 100% if the cutoff value of the signal intensity selected was 36-106. Quantitative results corresponding to 100% specificity were also observed, with similar sensitivity. No difference in interpretation between the two investigators occurred. CONCLUSION. Chemical shift subtraction MRI provides a high confidence level in distinguishing adrenal adenomas from adrenal metastases. The image subtraction technique also facilitates quantitative and qualitative evaluation of adrenal masses in chemical shift MRI.
URI: https://doi.org/10.2214/AJR.04.1370
https://www.ajronline.org/doi/10.2214/AJR.04.1370
http://hdl.handle.net/11452/21595
ISSN: 0361-803X
Koleksiyonlarda Görünür:Scopus
Web of Science

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