This paper presents brightness compensation and enhancement method for powerconstrained condition. The proposed method is useful for low-power device. We assumed two conditions: half and quarter power-consumption. We compare two brightness enhancement methods in both scenarios, histogram equalization and contextual and variational contrast enhancement methods. Both methods are contrast adjustme...

Background: Some tissues in human body are radiobiologically different from water and these inhomogeneity must be considered in dose calculation in order to achieve an accurate dose delivery. Dose verification in complex radiation therapy techniques, such as intensity‐modulated radiation therapy (IMRT) calls for volumetric, tissue equivalent and energy independent dosimeter. The purpose of this...

Pulsed Doppler echocardiography was employed to detect disturbed or turbulent flow diagnostic of aortic or mitral regurgitation. Sensitivity, specificity, diagnostic accuracy, and predictive value were assessed by the independent interpretation and comparison of aortic root angiograms (91 patients) and left ventriculograms (94 patients) to the time interval histogram display of the pulsed Doppl...

Recent studies indicate that maximizing the mutual information of the joint histogram of two images is an accurate and robust way to rigidly register two monoor multimodal images. Using mutual information for registration directly in a local manner is often not admissible owing to the weakened statistical power of the local histogram compared to a global one. We propose to use a global joint hi...

Background: Dose calculation algorithms play a very important role in predicting the explicit dose distribution. We evaluated the percent depth dose (PDD), lateral depth dose profile, and surface dose volume histogram in inhomogeneous media using calculation algorithms and inhomogeneity correction methods. Materials and Methods: The homogeneous and inhomogeneous virtual slab phantoms used in th...

Doppler sonographic criteria for assessing peripheral lymph nodes ! Introduction B-mode criteria provide the foundation for the sonographic identification of peripheral lymph nodes as normal or pathological and for differential diagnosis. “Sonography of Peripheral Lymph Nodes Part 1: Normal Findings and B-Image Criteria” therefore provides a comprehensive description of the sonographic appearan...

AIM To determine whether three-dimensional power Doppler can improve the recognition of pelvic tumor morphology and angiogenesis. METHODS Using this technique we analyzed 180 adnexal masses and 110 uterine lesions. Tumor volume, morphology, and vascularity were evaluated in each patient. Irregular and randomly dispersed vessels with complex branching depicted by comprehensive three dimensiona...