Nanae Tsuchiya1, Yuichiro Ayukawa, Sadayuki Murayama. 1. Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, 207, Uehara, Nishighara-cho, Nakagami-Gun, Okinawa 903-0215, Japan. nanae7a50@hotmail.com
Abstract
PURPOSE: The purpose of this study was to determine the effects of interstitial pneumonia on pulmonary, systemic, and bronchopulmonary shunt flow. MATERIALS AND METHODS: Phase-contrast flow measurements in the ascending aorta and pulmonary trunk were performed during free breathing and inspiratory breath-holding by use of a 1.5 T MR scanner. The study population comprised 11 patients with interstitial pneumonia and 15 healthy volunteers. Absolute blood flow, bronchopulmonary shunt flow, and difference in flow between normal breathing and breath-holding were compared between the groups. RESULTS: Both pulmonary and systemic blood flow during both breathing patterns in patients were significantly reduced compared with the volunteers (p < 0.05). However, bronchopulmonary shunt flow and reduction of systemic and pulmonary artery flow did not differ between groups. CONCLUSION: Interstitial pneumonia reduces both pulmonary and systemic blood flow, but it does not affect the amount of flow reduction during breath-holding. The bronchopulmonary shunt was not increased in interstitial pneumonia patients, probably because of stiffness of the bronchial arteries.
PURPOSE: The purpose of this study was to determine the effects of interstitial pneumonia on pulmonary, systemic, and bronchopulmonary shunt flow. MATERIALS AND METHODS: Phase-contrast flow measurements in the ascending aorta and pulmonary trunk were performed during free breathing and inspiratory breath-holding by use of a 1.5 T MR scanner. The study population comprised 11 patients with interstitial pneumonia and 15 healthy volunteers. Absolute blood flow, bronchopulmonary shunt flow, and difference in flow between normal breathing and breath-holding were compared between the groups. RESULTS: Both pulmonary and systemic blood flow during both breathing patterns in patients were significantly reduced compared with the volunteers (p < 0.05). However, bronchopulmonary shunt flow and reduction of systemic and pulmonary artery flow did not differ between groups. CONCLUSION:Interstitial pneumonia reduces both pulmonary and systemic blood flow, but it does not affect the amount of flow reduction during breath-holding. The bronchopulmonary shunt was not increased in interstitial pneumoniapatients, probably because of stiffness of the bronchial arteries.
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