One of the most important specifications of an industrial X-ray computed-tomography (CT) setup used for inspection is the 3-dimensional (3D) resolution that can be achieved in the volumetric image. Sometimes CT setups are evaluated in this regard using a 2D object such as the JIMA micro resolution chart; however, this approach measures the 2D resolution in a projection image and characterizes t...

OBJECTIVE The purpose of this study was to evaluate the image noise, low-contrast resolution, image quality, and spatial resolution of adaptive statistical iterative reconstruction in low-dose body CT. MATERIALS AND METHODS Adaptive statistical iterative reconstruction was used to scan the American College of Radiology phantom at the American College of Radiology reference value and at one-ha...

Recent developments on the 320 multi-detector CT technologies have made the volumetric acquisition of 4D high resolution cardiac images in a single heart beat possible. In this paper, we present a framework that uses these data to reconstruct the 4D motion of the endocardial surface of the left ventricle (LV) for a full cardiac cycle. This reconstruction framework captures the motion of the ful...

A monomodal slice-based displacement analysis of the spinal cord for three-dimensional computer tomography imaging in radiation therapy planning is presented. In total, 21 head and neck cases with tumor indications close to the spinal cord are studied and evaluated. Two-dimensional cross-correlation is applied to propagate manually segmented contours of the spinal cord from a high-resolution pl...

Background Cochlear implantation is an approved treatment which can be used to treat severe to profound hearing loss. Imaging before cochlear implant surgery is very important in decision making and assessing the temporal bone anatomy for surgery. We aimed to assess the diagnostic value of high resolution CT scan (HRCT), and MRI of temporal bone in candidate pati...

OBJECTIVE The purpose of this article is to illustrate the spectrum of pathologic and high-resolution CT features of hypersensitivity pneumonitis (HP). CONCLUSION High-resolution CT plays an important role in the diagnosis of HP. A confident diagnosis of subacute HP is based on the presence of ground-glass opacities, poorly defined centrilobular nodules, and mosaic attenuation on inspiratory ...

Figure 1 [1] There are two levels of CT imaging small animals – miniand micro-CT. Mini-CT has a voxel resolution that is equivalent to whole body CT of the adult human. Thus, a 30 cm diameter human chest is represented with up to 500 pixels clinically, so a 2 cm mouse chest would be represented by 500, 40, μm pixels. Higher resolution scans at the microscopic level are truly micro-CT scans. I w...

PURPOSE The development of flat panel detector technology has resulted in renewed interest in the possibility of generating CT-like images from rotational angiographic acquisitions. At least two commercial products now use cone beam reconstruction software in conjunction with flat panel detectors to produce such images. The purpose of the work presented here is to report on image quality obtain...

We deal with the reconstruction of the high-resolution (HR) computed tomography (CT) image from the CT projection data (Sinogram). Spatial resolution is one of the important parameters of CT images. Spatial resolution is a measure of how close to each other two objects that can still be distinguished. The spatial resolution of CT images depends on the field of view which in turn depends on the ...