HomePhoton-Counting Detector CT: from theory to practice

Photon-Counting Detector CT: from theory to practice

This new section reviews the theory and provides real-world examples of clinical application of PCD-CT.


All you need to know about PCD-CT

Loewe

CHRISTIAN LOEWE
Division of Cardiovascular and Interventional Radiology
Dept. of Bioimaging and Image-Guided Therapy
Medical University Vienna

Photon-counting detector (PCD) computed tomography (CT) is a new CT technology that utilises a direct conversion X-ray detector, in which the energy of the incident X-ray photon is directly recorded as electronical signal.

There are several advantages to PCD-CT over the traditional CT scanners incorporating energy-integrating detectors (EIDs). These include improvements in spatial resolution (via smaller detector pixel design) and iodine signal (via count weighting), still permitting multi-energy imaging, electronic noise elimination, and artefact reduction (via energy thresholds).

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PCD-CT Clinical Cases

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Arterial phase

Lucian Beer

PCD-CT in the diagnosis of Pancreatic Neuroendocrine Tumour

A 25-year-old asymptomatic female patient was referred to rule out an endocrine neoplasm of the pancreas given her positive family history of neuroendocrine neoplasm and MEN1 mutation.


Arterial phase

Lucian Beer

PCD-CT in the diagnosis of Clear Cell Renal Cell Carcinoma

A 72-year-old male patient was referred for further workup due to a suspected right kidney tumour. He presented no symptoms, and there was no family history of cancer.


Arterial phase 45 keV reconstructions

Lucian Beer

PCD-CT in the diagnosis of Hepatocellular Carcinoma

A 60-year-old male patient with advanced chronic liver disease due to chronic hepatitis B infection was referred due to suspicion of hepatocellular carcinoma (HCC) in the left liver lobe.


Arterial phase 45 keV reconstructions

Lucian Beer

PCD-CT in the diagnosis of Intrahepatic Cholangiocellular Carcinoma

A 70-year-old female patient was referred for suspected cholangiocellular carcinoma workup. She presented with diffuse abdominal pain but no further clinical signs.