Learning objectives The purposes of this exhibit are as follows. 1.
To describe basic facts and technological advancements in the latest ultra-high-resolution CT (UHRCT) and iterative reconstruction (IR) algorithm. 2.
To illustrate clinical advantages of UHRCT and IR over standard multi-detector CT (MDCT) with filtered back-projection (FBP) algorithm. 3.
To demonstrate clinical impacts of UHRCT and IR in various regions by presenting various clinical images.
Background A state-of-the-art UHRCT scanner (Aquilion Precision,
Toshiba) with slice collimation of 0.25 mm x 160 and matrix size of 1024 x 1024 or 2048 x 2048 ( Figure 1 ) and IR algorithm (FIRST,
Toshiba) ( Figure 2 ) have recently become clinically available.
This combination is expected to remarkably improve spatial resolution with comparable or reduced image noise.
Findings and procedure details
Findings and procedure details UHRCT technologies CT systems have developed from conventional CT,
into area detector CT (ADCT) to achieve wider,
and finer CT scanning with lower dose.
CT in-plane spatial resolution has remained almost unchanged so far for approximately 30 years ( Figure 3 ).
UHRCT has been newly introduced to remarkably improve in- and through-plane spatial resolution in March,
2017 ( Figures 1 and 4 ). Major features of UHRCT...
Conclusion The latest UHRCT and full IR combination improves in- and through-plane spatial resolution with comparable or reduced image noise.
It is clinically useful for the delineation and diagnosis of various fine structures and lesions.
Radiologists and radiological technologists should understand the aforementioned technological and clinical advantages of the UHRCT and full IR to maximally enhance patient management.
kyorin University hospital
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