Optimal phase analysis of electrocardiogram-gated computed tomography angiography in patients with Stanford type A acute aortic dissection

Autor: Ukihide Tateishi, Koichi Mori, Ayumi Yamada, Eiichiro Kanda, Susumu Manabe, Nobuhiro Takaya, Mitsuhiro Kishino, Tomoyuki Fujioka, Shuichi Kawada, Ken Yamagiwa, Yuki Yokoi, Kenji Nishida
Jazyk: angličtina
Rok vydání: 2020
Předmět:
lcsh:Medical physics. Medical radiology. Nuclear medicine
DLP
dose-length-product
lcsh:R895-920
Article
030218 nuclear medicine & medical imaging
03 medical and health sciences
Electrocardiography
0302 clinical medicine
IVR
isovolumetric relaxation phase
medicine.artery
Ascending aorta
Heart rate
AEC
automatic exposure control
medicine
Thoracic aorta
E
effective dose
Radiology
Nuclear Medicine and imaging
In patient
bpm
beats per minute
MPR
multiplanar reconstruction
Computed tomography angiography
Aortic dissection
medicine.diagnostic_test
HR
heart rate
business.industry
Radiation dose
S
systolic phase
medicine.disease
RR
R-R interval
RF
rapid filling phase
R-R Interval
AC
atrial contraction phase
AR
Aortic Regurgitation
030220 oncology & carcinogenesis
Aorta thoracic
AAD
acute aortic dissection
SF
slow filling phase
ECG
electrocardiogram
CTA
computed tomography angiography
D
diastolic phase
business
Nuclear medicine
Dissecting
Zdroj: European Journal of Radiology Open
European Journal of Radiology Open, Vol 7, Iss, Pp 100289-(2020)
ISSN: 2352-0477
Popis: Highlights • Patients with Stanford type A acute aortic dissection with perfused false lumen. • We created and randomized 10 cross-sectional images of each phase for 20 patients. • We scored these images depending on the degree of flap stoppage. • Image scores were significantly better in the 65 %–100 % R-R interval group.
Objective To determine the phase that facilitates flap observation of the ascending aorta in Stanford type A acute aortic dissection with perfused false lumen. Methods We reconstructed retrospective Electrocardiogram-gated Computed Tomography Angiography images of the ascending aorta of all 20 patients to 20 phases of curved-multiplanar reconstruction in 5% increment. One radiologist created and randomized 10 cross-sectional images of each phase for every patient and two radiologists scored these images on a 5-point scale depending on the degree of flap stoppage. We calculated the average score for each phase of each case and compared them among the three groups. Results Image scores were significantly better in the 65 %–100 % R-R interval group than those in the 5%–30 % (p < 2e-16) and 35 %–60 % R-R interval groups(p = 7.2e-10). Similar scores were observed in the Heart Rate > 70 group (p = 0.00039, 2.2e-14). Moreover a similar tendency was observed in the arrhythmia group (p = 0.0035, 0.294). No difference was found in the degree of flap stoppage in the 65 %–100 % R-R interval group between the Heart Rate > 70 and Heart Rate ≤ 70 groups (p = 0.466) and between the arrhythmia and non-arrhythmia groups (p = 0.1240). Conclusion In observing the ascending aorta, We obtained a good image at 65 %–100 % R-R interval and similar tendency was observed in the patients with arrhythmia.
Databáze: OpenAIRE
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