Xenon-inhalation computed tomography for noninvasive quantitative measurement of tissue blood flow in pancreatic tumor.

Abstract

BACKGROUND AND AIMS:

The purpose of this prospective study was to demonstrate the ability to measure pancreatic tumor tissue blood flow (TBF) with a noninvasive method using xenon inhalation computed tomography (xenon-CT) and to correlate TBF with histological features, particularly microvascular density (MVD).

METHODS:

TBFs of pancreatic tumors in 14 consecutive patients were measured by means of xenon-CT at diagnosis and following therapy. Serial abdominal CT scans were obtained before and after inhalation of nonradioactive xenon gas. TBF was calculated using the Fick principle. Furthermore, intratumoral microvessels were stained with anti-CD34 monoclonal antibodies before being quantified by light microscopy (×200). We evaluated MVD based on CD34 expression and correlated it with TBF.

RESULTS:

The quantitative TBF of pancreatic tumors measured by xenon CT ranged from 22.3 to 111.4 ml/min/100 g (mean ± SD, 59.6 ± 43.9 ml/min/100 g). High correlation (r = 0.885, P < 0.001) was observed between TBF and intratumoral MVD.

CONCLUSION:

Xenon-CT is feasible in patients with pancreatic tumors and is able to accurately estimate MVD noninvasively.

• Authors: Masaru Kubota, Takamichi Murakami, Hiroaki Nagano, Hidetoshi Eguchi, Shigeru Marubashi, Shogo Kobayashi, Hiroshi Wada, Masahiro Tanemura, Keizo Dono, Shoji Nakamori, Masato Sakon, Morito Monden, Masaki Mori, Yuichiro Doki
• Journal: Digestive diseases and sciences (Dig Dis Sci) Vol. 57 Issue 3 Pg. 801-5 (Mar 2012) ISSN: 1573-2568 [Electronic] United States
• PMID: 21953140 (Publication Type: Clinical Trial, Journal Article)

Chemical References

• Xenon

Topics

• Adenocarcinoma (blood supply, diagnostic imaging, pathology)
• Carcinoma, Islet Cell (blood supply, diagnostic imaging, pathology)
• Carcinoma, Pancreatic Ductal (blood supply, diagnostic imaging, pathology)
• Feasibility Studies
• Gastrinoma (blood supply, diagnostic imaging, pathology)
• Humans
• Microcirculation
• Neovascularization, Pathologic (diagnostic imaging, pathology)
• Neuroendocrine Tumors (blood supply, diagnostic imaging, pathology)
• Pancreatic Neoplasms (blood supply, diagnostic imaging, pathology)
• Perfusion Imaging (methods)
• Prospective Studies
• Tomography, X-Ray Computed (methods)
• Xenon