AJR. American journal of roentgenology
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AJR Am J Roentgenol · Aug 2006
MRI Measurement of the hemodynamics of the pulmonary and systemic arterial circulation: influence of breathing maneuvers.
The purpose of this study was to use phase-contrast MRI to evaluate the influence of various breathing maneuvers on the hemodynamics of the pulmonary and systemic arterial circulation. ⋯ Measurements during smooth respiration showed the smallest SD. Therefore, no-breath-hold measurements should be considered for assessment of hemodynamics in clinical practice.
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AJR Am J Roentgenol · Jul 2006
Management of patients with small pulmonary nodules: a survey of radiologists, pulmonologists, and thoracic surgeons.
The objective of our study was to survey recommendations for the management of small pulmonary nodules found on helical CT from radiologists, pulmonologists, and thoracic surgeons. ⋯ There are significant differences in the management of small pulmonary nodules among radiologists, pulmonologists, and thoracic surgeons. Whereas radiologists tend to recommend short-term follow-up, pulmonologists and thoracic surgeons prefer a more aggressive approach, especially in patients with a higher likelihood of malignancy.
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AJR Am J Roentgenol · Jul 2006
Software volumetric evaluation of doubling times for differentiating benign versus malignant pulmonary nodules.
The purpose of our study was to evaluate the reliability of software-calculated doubling times for discerning malignant versus benign nodules. ⋯ Software-calculated pulmonary nodule doubling times of more than 500 days have a 98% negative predictive value for the diagnosis of solid malignant pulmonary nodules. This method may be useful for diagnosing malignant pulmonary nodules on follow-up CT.
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AJR Am J Roentgenol · Jun 2006
Comparative StudyMDCT angiography of acute chest pain: evaluation of ECG-gated and nongated techniques.
The objective of our study was to compare MDCT angiography protocols used in patients with acute chest pain caused by vascular, nonvascular, and cardiac abnormalities. ⋯ The chest pain protocol can be used to assess both the pulmonary arteries and the thoracic aorta, whereas the ECG-gating protocol appears to be a promising adjunct for a comprehensive single chest pain protocol.
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AJR Am J Roentgenol · May 2006
Comparative StudyImaging of lymphatic vessels in breast cancer-related lymphedema: intradermal versus subcutaneous injection of 99mTc-immunoglobulin.
The disordered physiology that results from axillary lymph node clearance surgery for breast cancer and that leads to breast cancer-related lymphedema is poorly understood. Rerouting of lymph around the axilla or through new pathways in the axilla may protect women from breast cancer-related lymphedema. The aim of the study was to compare intradermal with subcutaneous injection of technetium-99m ((99m)Tc)-labeled human polyclonal IgG (HIG) with respect to lymphatic vessel imaging. ⋯ In patients with breast cancer-related lymphedema, lymphatic vessels are more clearly depicted after intradermal than subcutaneous injection as a result of direct access of radiotracer to dermal lymphatics. This finding has implications for imaging lymphatic vessel regeneration and lymph rerouting.