Photon-counting detector CT versus cone-beam CT for postoperative cochlear implant imaging

To compare image-quality and radiation dose between photon-counting CT (PCD CT) and cone-beam CT (CBCT) for postoperative cochlear implantation (CI) imaging. METHODS AND MATERIALS: This retrospective study included 224 postoperative CI datasets from July 2019 to February 2026, including 112 PCD CT scans using three dosage protocols (regular dose [RD], low dose [LD], ultra-low dose [ULD]) and 112 120-kV CBCT scans....

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Photon-counting detector CT may offer improved image quality for postoperative cochlear implant assessment compared to cone-beam CT; clinicians and implant centres should watch emerging evidence to inform imaging protocol decisions, but current practice need not change without local validation.

Selecting the optimal postoperative imaging modality for cochlear implants directly affects both diagnostic accuracy and patient radiation safety, making comparative data on newer CT technologies clinically significant for implant programmes.

1. 01Photon-counting detector CT (PCD-CT) is a next-generation imaging technology being compared to standard cone-beam CT for cochlear implant follow-up.
2. 02The study evaluates both image quality and radiation dose — two competing priorities in postoperative imaging.
3. 03Results may inform which imaging modality better visualises electrode position and peri-cochlear anatomy post-implantation.
4. 04Cone-beam CT is currently the most widely used modality for postoperative cochlear implant imaging.
5. 05Published in European Radiology, indicating multidisciplinary relevance to audiology and radiology teams.

PMID

42785130

DOI

10.1016/j.ejrad.2026.113256.

Journal

European Journal of Radiology

Publication type

research_article

Evidence level

2b

Population

Postoperative cochlear implant recipients requiring imaging evaluation

Intervention

Photon-counting detector CT (PCD-CT)

Comparator

Cone-beam CT