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Contribution of diffusion weighted MRI to diagnosis and staging in gastric tumors and comparison with multi-detector computed tomography

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Radiology and Oncology

Tom 51 (2017): Zeszyt 1 (March 2017)

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Article Category: Research Article

Data publikacji: 22 lut 2017

Zakres stron: 23 - 29

Otrzymano: 07 lut 2016

Przyjęty: 24 sie 2016

DOI: https://doi.org/10.1515/raon-2017-0002

Słowa kluczowe
gastric cancer, diffusion weighted imaging, MDCT, staging

© 2017 Harun Arslan, Mehmet Fatih Özbay, İskan Çallı, Erkan Doğan, Sebahattin Çelik, Abdussamet Batur, Aydın Bora, Alpaslan Yavuz, Mehmet Deniz Bulut, Mesut Özgökçe, Mehmet Çetin Kotan

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

T4N3M1 C Axial MDCT (A,B,C) and DWI (D,E,D,F,G). (A) Axial contrasted-enhanced MDCT shows gastric corpus tumor and adjacent lymphadenopathies, (B) peripherally contrast enhanced lesions in the liver (metastasis), and (C) an invasive mass extending from the posterior of the gastric corpus to the fatty tissue (arrows). On DWI (D–G): on b800 DWI (D, E) there are diffusion restrictions in the gastric corpus and liver (Gastric tumor + liver metastasis), (F) restrictions that are compatible with lymphadenopathies are seen in the gastro-hepatic ligament, hepatic hilum, and the celiac axis, and (G) invasion of the fatty tissue in the posterior of the gastric corpus (arrow).

T2N3M0 C Axial MDCT (A, B) and DWI (C,D,E) . (A,B) axialcontrast-enhanced MDCT: Wall thickness in the gastric cardia-corpus and gastro-hepatic ligament and para-aorticlymphadenopathies, (C, D, E) b800 DWI images: (C) Diffusion restriction in the gastric cardia and corpus, (D) mm sized lymphadenopathiesin the gastrohepatic ligament, and(e)para-aorticandceliac lymphadenopathies.

(A, B) T2N2M0 Axial MDCT and b800 DWI. (A) Axialcontrast-enhanced MDCT and (B) b800 DWI demonstrate wall thickness in the gastric corpus withdiffusion restrictions, andadjacent lymphadenopathies (mm sized) on DWI.

(A, B) T3N1MO Axial MDCT and DWI. (A) Axialcontrast-enhanced MDCT and (B) DWI demonstratewall thickness at gastric corpus and diffusion restriction and adjacent lymphadenopathieswere observed (arrow).

Effectiveness of DWI and MDCT in T staging according to surgical pathology result

	T2		T3	T4
	Sensitivity	72.7%	71.0%	55.6%
	Specificity	77.5%	80.0%	92.9%
DWI	PPV	47.1%	84.6%	62.5%
	NPV	91.2%	64.0%	90.7%
	Kappa (p)	0.419 (0.002)	0.488 (< 0.001)	0.506 (< 0.001)
	Sensitivity	63.6%	74.2%	66.7%
	Specificity	77.5%	80.0%	95.2%
MDCT	PPV	43.8%	85.2%	75.0%
	NPV	88.6%	66.7%	93.0%
	Kappa (p)	0.353 (0.009)	0.523 (< 0.001)	0.647 (< 0.001)

Efficiency of DWI and MDCT in N staging according to surgical pathology result

	N1		N2	N3
	Sensitivity	75.0%	79.3%	60.0%
	Specificity	84.6%	77.3%	97.6%
DWI	PPV	60.0%	82.1%	85.7%
	NPV	91.7%	73.9%	90.9%
	Kappa (p)	0.549 (< 0.001)	0.563 (< 0.001)	0.649 (< 0.001)
	Sensitivity	66.7%	69.0%	50.0%
	Specificity	82.1%	68.2%	90.2%
MDCT	PPV	53.3%	74.1%	55.6%
	NPV	88.9%	62.5%	88.1%
	Kappa (p)	0.448 (0.001)	0.367 (0.008)	0.418 (0.003)

eISSN:: 1581-3207
Język:: Angielski

Częstotliwość wydawania:: 4 razy w roku
Dziedziny czasopisma:: Medicine, Clinical Medicine, Radiology, Internal Medicine, Haematology, Oncology

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