Milena Ivanović

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PURPOSE To determine the weighted average sensitivity of magnetic resonance (MR) imaging in the prospective detection of acute neck injury and to compare these findings with those of a comprehensive conventional radiographic assessment. MATERIALS AND METHODS Conventional radiography and MR imaging were performed in 199 patients presenting to a level 1(More)
OBJECTIVE Determination of skeletal or bone age is often used in pediatrics and orthopedics. The most commonly used bone age standards in the United States, those published by Greulich and Pyle, were derived from white children of the upper socioeconomic class in 1931-1942. We examined whether these standards apply to the current assessment of bone age in(More)
UNLABELLED The performance of pinhole SPECT and the application of this technology to investigate the localization properties of radiopharmaceuticals in vivo in small laboratory animals are presented. METHODS System sensitivity and spatial resolution measurements of a rotating scintillation camera system are made for a low-energy pinhole collimator(More)
This paper describes a motion detection method specific to hybrid positron emission tomography/single photon emission computed tomography systems. The method relies on temporal fractionation of the acquisition into three data sets followed by an algorithm based on the cross correlation (CC) of partial sinograms from successive sets at different rotations of(More)
We investigated the effects of acute i.v. administration of 2 mg of delta 9-tetrahydrocannabinol (THC) on regional brain glucose metabolism using 18F-2-fluoro-2-deoxyglucose and positron emission tomography (PET) in eight normal subjects. Subjects were tested twice: during baseline conditions and 30-40 min after THC administration. Changes in global(More)
Recent developments in the use of pinhole SPECT and dedicated PET for UHR small animal imaging have identified the technology that can be used to provide images with spatial resolution of the order of 1 to 3 mm. In SPECT imaging, rotating camera pinhole SPECT has provided the means to use existing equipment to achieve UHR images. It has the disadvantages of(More)
Image registration in nuclear medicine and radiology refers to the spatial matching or merging of two or more images from the same or different imaging modalities. The coordinates of the corresponding picture elements (pixels) from different images are transformed to align and equate their positions and spatial coordinates. Correlative image registration is(More)
The goals of this study were to evaluate the feasibility of using ultrasonography of the spine in the follow-up evaluation of patients with repaired myelomeningocele at birth and to compare sonography with the accepted modality of magnetic resonance imaging. Over a period of 4 years we performed 165 sonographic studies in 101 patients; 107 sonographic(More)
RATIONALE AND OBJECTIVES The authors assessed the feasibility of using magnetic resonance (MR) urography to acquire functional, dynamic, and anatomic information in human subjects with normal and hydronephrotic kidneys. MATERIALS AND METHODS In subjects known to have or suspected of having hydronephrosis, split renal filtration fractions were measured(More)
A study was conducted to evaluate the feasibility of simultaneous dual radionuclide brain imaging with 123I and 99mTc using photopeak image subtraction techniques or offset photopeak image acquisition. The contribution of the photons from one radionuclide to a second radionuclide's photopeak energy window (crosstalk) was evaluated for SPECT and planar(More)