The measurement of radioactivity deposited in the lung is often performed with an array of germanium detectors placed over the chest of the individual. The detector array size can be from four to eight detectors depending on the size of the germanium detector and Dewar assembly. Typically, large area diameter germanium detectors (70 mm diameter) consist of four detectors, and the larger arrays ...

BACKGROUND AND OBJECTIVES Prior studies indicate that up to 35% of cases of severe aortic stenosis (AS) have paradoxical low flow, low gradient despite preserved left ventricular ejection fraction (LVEF). However, error in left ventricular outflow tract (LVOT) diameter may lead to misclassification. Herein, we determined whether measurement of LVOT diameter by transesophageal echocardiography (...

OBJECTIVE To evaluate the reliability of 3-dimensional ultrasound (3D-US) for the measurement of choroidal melanomas. DESIGN Retrospective case series. PARTICIPANTS Forty-two consecutive cases of choroidal melanoma imaged with 3D-US. METHODS Tumor measurements obtained with ophthalmoscopy, transillumination, standard ultrasound techniques, 3D-US, and pathological studies. Tumor diameters,...

We here present the results of ultrasonographic (US) evaluations on the alteration of renal diameter of chronic HD patients. Of 109 outpatient HD patients who had neither severe acquired cystic disease of the kidney nor hereditary polycystic kidney disease, we performed US two or three times to measure their maximum renal diameter (mean of both kidneys), and the yearly alteration rate was calcu...

A new measurement of the pulmonary artery diameter is obtained where the artery may be robustly segmented between the heart and the artery bifurcation. An automated algorithm is presented that can make this pulmonary artery measurement in low-dose non-contrast chest CT images. The algorithm uses a cylinder matching method following geometric constraints obtained from other adjacent organs that ...

This study presents a novel method for automatic measurement of the anteroposterior diameter of the thyroid gland, in ultrasound images. Anteroposterior diameter is widely considered a basic parameter for goiter assessment. Goiter refers to abnormal enlargement of the thyroid gland and it is associated with iodine deficiency and various pathologic conditions including Hashimoto’s thyroiditis, a...