The multislice CT (MSCT), or multi-detector- row CT (MDCT), is a CT system equipped with multiple rows of CT detectors to create images of multiple sections. This CT system has differ- ent characteristics from conventional CT sys- tems, which have only one row of CT detectors.

What is multislice CT scan?

The multislice CT (MSCT), or multi-detector- row CT (MDCT), is a CT system equipped with multiple rows of CT detectors to create images of multiple sections. This CT system has differ- ent characteristics from conventional CT sys- tems, which have only one row of CT detectors.

What is the difference between spiral CT and multislice CT?

If by conventional spiral CT you mean a spiral CT scanner that has just one detector row, then the only difference between your “conventional” and a multi-detector spiral CT is the number of detector rows.

What is isotropic imaging?

Isotropic imaging is characterized by an isotropic spatial resolution, i.e., a spatial resolution identical in the three spatial directions. The main parameters that affect the spatial resolution are the slice thickness, the reconstruction increment, and the reconstruction filter.

What is collimation in CT?

The collimator is located immediately in front of the detectors to protect them from scattered X-rays. Ideally, each detector in a CT scanner measures intensity of X-rays that reach the detector after traveling along a straight-line path from the X-ray source to the detector.

What is a MSCT scan?

Cardiac imaging by multi-slice computed tomography (MSCT) is a recently developed technique for assessing the function of the heart and coronary arteries non-invasively. Cardiac MSCT uses X-ray beams and a liquid dye to form a 3-D image of the heart and vessels.

In which year multislice CT is introduced?

In 1998, all major CT manufacturers introduced multislice CT (MSCT) systems, which typically offered simultaneous acquisition of four slices at a rotation time of 0.5 s, providing considerable improvement of scan speed and longitudinal resolution and better use of the available X-ray power (5–7).

What is 64-slice CT scan?

Washington Hospital’s Outpatient Imaging Center uses a state-of-the-art 64-slice computed tomography (CT) scanner. The Scanner creates 64 high-resolution anatomical images per rotation. This will decrease scan times to several seconds, less than 15 seconds in most cases.

What do you mean by slice in CT?

The term slice refers to the number of rows of detectors in the z-axis of a CT. For example, in an 8-slice CT, there are eight slices of data captured for each rotation of the gantry.

What is isotropic CT?

The term isotropic is used to refer to the size of the voxels used in a volume data set. When the slice thickness is equal to the pixel size, all dimensions of the voxel is a perfect cube, and the data set acquired is said to be isotropic.

What is an isotropic voxel in CT?

Each three-dimensional voxel represents specific x-ray absorption. The voxel size on CBCT images is isotropic, which means that all the sides are the same dimension with uniform resolution in all directions.

What is matrix in CT scan?

Matrix: Two dimensional grid of pixels, used to compose images on a display monitor. The matrix determines the number of rows and columns. Partial volume effect: When different tissues/objects are represented by the same voxel. Each tissue/object only partially fills the voxel and is therefore a partial volume.

What is the difference between MDCT and HRCT?

MDCT showed 25 more lobes with cylindric, 11 more lobes with varicose, and four more lobes with cystic bronchiectasis than did HRCT. Sensitivity, specificity, and positive and negative predictive values of HRCT in detecting bronchiectasis were 71%, 93%, 88%, and 81%, respectively.

What is multi slice CT scan 19?

Multi Detector System Multi Slice Helical CT Scan 19. Multi slice Ct Scan 1.) Uses the principle of Helical scanner 2.)Acquires Multiple slices per tube rotation 3.) Covers more volume of the patient in one rotation and less time.

What are the advantages of MSCT over slice CT?

Slice pitch is not as important as beam pitch in CT. The other major advantage of MSCT is in evaluation of sick patients such as poly-trauma victims, pediatric and unco-operative patients.

How many cells are there in a 16 slice CT scan?

Mosaic Detector (for 16 slice CT) • 16 cells in Z direction –each cell 1.25 mm (in Z axis). • 16 cells (Z) x 912 cells (transverse) = 14592 total cells. 27. 2. RECONSTRUCTIONS SS- reconstruct images of SAME thickness with different image indexing (table increment intervals)  MS- acquire 3D raw data that are contiguous in space.

What is a CT scan used for?

Computed tomography (CT scan) is a medical imaging procedure that uses computer-processed X-rays to produce tomographic images or ‘slices’ of specific areas of the body. These cross-sectional images are used for diagnostic and therapeutic purposes in various medical disciplines. Michelle Daigle , Did you try ⇒ www.HelpWriting.net ⇐?.