23 research outputs found
Medical image colorization for better visualization and segmentation
Medical images contain precious anatomical information for clinical procedures. Improved understanding of medical modality may contribute significantly in arena of medical image analysis. This paper investigates enhancement of monochromatic medical modality into colorized images. Improving the contrast of anatomical structures facilitates precise segmentation. The proposed framework starts with pre-processing to remove noise and improve edge information. Then colour information is embedded to each pixel of a subject image. A resulting image has a potential to portray better anatomical information than a conventional monochromatic image. To evaluate the performance of colorized medical modality, the structural similarity index and the peak signal to noise ratio are computed. Supremacy of proposed colorization is validated by segmentation experiments and compared with greyscale monochromatic images
A novel de novo TSC2 nonsense mutation detected in a pediatric patient with tuberous sclerosis complex
Use of high speed liquid chromatography (HSLC) in the pharmaceutical industry. Practical aspects and limitations
A computational simulation of the effect of hybrid treatment for thoracoabdominal aortic aneurysm on the hemodynamics of abdominal aorta
Hearing abilities and sound reception of broadband sounds in an adult Rissoâs dolphin (Grampus griseus)
© 2015, Springer-Verlag Berlin Heidelberg. While odontocetes do not have an external pinna that guides sound to the middle ear, they are considered to receive sound through specialized regions of the head and lower jaw. Yet odontocetes differ in the shape of the lower jaw suggesting that hearing pathways may vary between species, potentially influencing hearing directionality and noise impacts. This work measured the audiogram and received sensitivity of a Rissoâs dolphin (Grampus griseus) in an effort to comparatively examine how this species receives sound. Jaw hearing thresholds were lowest (most sensitive) at two locations along the anterior, midline region of the lower jaw (the lower jaw tip and anterior part of the throat). Responses were similarly low along a more posterior region of the lower mandible, considered the area of best hearing in bottlenose dolphins. Left- and right-side differences were also noted suggesting possible leftâright asymmetries in sound reception or differences in ear sensitivities. The results indicate best hearing pathways may vary between the Rissoâs dolphin and other odontocetes measured. This animal received sound well, supporting a proposed throat pathway. For Rissoâs dolphins in particular, good ventral hearing would support their acoustic ecology by facilitating echo-detection from their proposed downward oriented echolocation beam