What is a multi-detector computed tomography?

What is a multi-detector computed tomography?

multi-detector computed tomography (MDCT) A form of computed tomography technology with a two-dimensional (2-D) detector that produces multiple, thinner slices in a single rotation and a shorter period of time allowing for more detail and additional view capabilities.

What is detector in CT scan?

Detectors collect information regarding the degree to which each anatomic structure attenuated the beam during a CT scan. Each measures the intensity of transmitted x-ray radiation along a beam that’s projected from the x-ray source to a particular detector element.

How many detectors does a CT scan have?

Detector Array Now all scanners are multi-slice and have 8-64 rows of detectors. There are generally 1000-2000 detectors in each row.

How does multidetector CT work?

Multidetector Spiral CT MDCT scanners, also known as multidetector row CT, have multiple parallel rows of x‐ray detectors (currently, 4, 8, 16, or 64 for different machines). Each of the rows records data independently as the gantry rotates; consequently, a much larger patient volume is imaged with each rotation.

What is the difference between CT and MDCT?

There are two main differences between conventional spiral CT and MDCT. Firstly, MDCT has a high acquisition speed (0.37 s rotation speed vs 1 s rotation speed for conventional CT); secondly, and probably more importantly, MDCT acquires volume data instead of individual slice data.

Can a CT scan with contrast detect heart problems?

A Cardiac CT scan can help your doctor detect various conditions of the heart including heart disease, blood clots, tumors, defects and others.

How does a CT detector work?

During a CT scan, the patient lies on a bed that slowly moves through the gantry while the x-ray tube rotates around the patient, shooting narrow beams of x-rays through the body. Instead of film, CT scanners use special digital x-ray detectors, which are located directly opposite the x-ray source.

What is the purpose of the detectors in a CT unit?

The detectors in CT function as image receptors. A detector measures the amount of radiation transmitted through the body and converts the measurement into an electrical signal proportional to the radiation intensity.

What are the ideal properties of a CT detector?

Detector characteristics are crucial for obtaining good CT image quality. The main requirements are: accuracy, dynamic range, stability (short- and long-term), uniformity, speed of response, resolution, geometric efficiency, detector quantum efficiency and cross-talk (spatial and temporal).

What is a CT detector array?

The detector array: the key component at the heart of a CT scanner. A key component of a modern multi-slice CT scanner is the detector array: this senses the X-ray radiation which is partially attenuated by tissues in the patient’s body, and converts them into a digital signal.

Is CT angiography invasive?

A CT angiogram is a less invasive test than a standard angiogram. A standard angiogram involves threading a thin tube called a catheter through an artery in your arm or leg up to the area being studied. But with a CT angiogram, no tubes are put in your body.

What is the purpose of a coronary CT scan?

A computerized tomography (CT) coronary angiogram is an imaging test that looks at the arteries that supply blood to your heart. It might be done to diagnose the cause of chest pain or other symptoms. A CT coronary angiogram uses a powerful X-ray machine to produce images of your heart and its blood vessels.

What does multidetector CT / CTA stand for?

Multidetector CT/CTA. What is Multidetector CT/CTA? Multidetector computed tomography (MDCT) is a form of computed tomography (CT) technology for diagnostic imaging. In MDCT, a two‐dimensional array of detector elements replaces the linear array of detector elements used in typical conventional and helical CT scanners.

How is multidetector computed tomography ( MDCT ) used?

Multidetector computed tomography (MDCT) is a form of computed tomography (CT) technology for diagnostic imaging. In MDCT, a two‐dimensional array of detector elements replaces the linear array of detector elements used in typical conventional and helical CT scanners.

What’s the difference between multislice CT and multidetector CT?

Refinements in detector technology allow new CT scanners to obtain multiple slices in a single rotation. These scanners, called “multislice CT” or “multidetector CT,” allow thinner slices to be obtained in a shorter period of time, resulting in more detail and additional view capabilities.

How many X-ray detectors are in a multidetector CT scanner?

Multidetector Spiral CT MDCT scanners, also known as multidetector row CT, have multiple parallel rows of x‐ray detectors (currently, 4, 8, 16, or 64 for different machines). Each of the rows records data independently as the gantry rotates; consequently, a much larger patient volume is imaged with each rotation.