Journals / Selçuk Tıp Dergisi / 2021 / Cilt: 37 - Sayı: 1

Pulmonary Angiography with Low Dose Contrast Media in 64-Slice CT: A Feasibility Study

Düşük Doz Kontrast Madde ile 64 Kesit BT'de Pulmoner Anjiyografi: Bir Fizibilite Çalışması

Pages
64–69
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

With the low-dose protocol, as in the standard protocol, sufficient vascular opacification can be obtained for diagnosis.

📌 3 Key Takeaways

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Objective & Hypothesis:Aim: The aim of our study was to evaluate vascular enhancement in pulmonary CT angiography (PCTA) performed on a 64-slice CT scanner with fixed-delay time and 30 cc contrast media administration in comparison to standard PCT A.
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Key Findings & Data:Patients and Methods: Patients who underwent CT angiography for suspected pulmonary embolism in our radiology unit between January 1, 2015 and January 1, 2016 were retrospectively reviewed.
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Conclusion & Impact:With the low-dose protocol, as in the standard protocol, sufficient vascular opacification can be obtained for diagnosis.
🔬Design:Review & Systematic Survey
📍Scope:2015 Verileri
⚙️Variables:Domain Parameters

Abstract

Aim: The aim of our study was to evaluate vascular enhancement in pulmonary CT angiography (PCTA) performed on a 64-slice CT scanner with fixed-delay time and 30 cc contrast media administration in comparison to standard PCT A. Patients and Methods: Patients who underwent CT angiography for suspected pulmonary embolism in our radiology unit between January 1, 2015 and January 1, 2016 were retrospectively reviewed. Due to the risk of contrast nephropathy, images of 35 patients (Protocol A) who underwent CT with 30 cc low dose contrast media and fixed delay time and 36 patients (Protocol B) with standard CT images were evaluated for pulmonary embolism; contrast densities from the main pulmonary arteries and branches were measured for the quality of vascular opacification. Contrast density in the distal branches were divided into 3 categories based on observations: poor (1), good (2) and excellent (3). The differences between evaluations and measurements were compared statisticall y. Results: Embolism was detected in 14 (19.7%) of the total 71 patients included in the study. There was no statistical difference between the groups in terms of age, gender and presence of embolism. The average of the contrast density measured from the pulmonary arteries in A and B groups, 342 ± 98, 339 ± 92, respectively and there was no statistically significant difference (p = 0.932). There was no statistically significant difference between the two groups in terms of contrast densities (poor, good, excellent) in the distal branches (p = 0.769). Conclusions: The dose of contrast medium used in pulmonary CT angiographs with a 64-slice CT scanner can be significantly reduced. With the low-dose protocol, as in the standard protocol, sufficient vascular opacification can be obtained for diagnosis.

Özet

Amaç: Çalışmamızın amacı, sabit gecikme zamanı ve 30 cc kontrast madde verilerek 64 kesitli BT tarayıcıda yapılan pulmoner BT anjiyografide (PBTA) standart PBTA ile karşılaştırıldığında vasküler kontrastlanmayı değerlendirmektir. Hastalar ve Yöntem: Radyoloji ünitemizde 1 Ocak 2015 ile 1 Ocak 2016 tarihleri arasında pulmoner emboli şüphesi nedeniyle BT anjiyografi yapılan hastalar retrospektif olarak incelendi. Kontrast nefropatisi riski nedeniyle 30 cc düşü k doz kontrast madde ve sabit gecikme zamanı ile BT çekimi yapılan 35 hastayla (Protokol A), standart BT çekimi yapılan 36 hastanın (Protokol B) görüntüleri pulmoner emboli açısından değerlendirildi; vasküler opasifikasyonun kalitesi için ana pulmoner arterler ve dalları düzeyinden kontrast dansiteleri ölçüldü. Distal dallardaki kontrast yoğunluğu gözleme dayalı 3 kategoriye ayrılarak değerlendirildi: kötü (1), iyi (2) ve mükemmel (3). Değerlendirmeler ve ölçümler arasındaki farklılıklar istatiksel olarak kar şılaştırıldı. Bulgular: Çalışmaya dahil edilen toplam 71 hastanın 14’ünde (%19,7) emboli saptandı. Gruplar arasında yaş, cinsiyet ve emboli varlığı açısından istatiksel farklılık saptanmadı. Her iki çalışma grubunda pulmoner arterlerden ölçülen kontrast dansitesinin ortalaması A grubu için 342±98, B grubu için 339±92 olup anlamlı farklılık saptanmamıştır (p=0,932). Distal dallardaki kontrast yoğunluğu (kötü, iyi, mükemmel) açısından her iki grup karşılaştırıldığında anlamlı istatiksel farklılık saptanmamıştır (p=0.769). Sonuç: 64 kesitli bir BT tarayıcı ile PBTA’lerde kullanılan kontrast madde dozu önemli ölçüde azaltılabilir. Düşü k doz protokolüyle, standart protokolde olduğu gibi, tanı için yeterli vasküler opaklaşma elde edilebilir.

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Cite This Article

KARAKUŞ, H., POYRAZ, N. (2021). Pulmonary Angiography with Low Dose Contrast Media in 64-Slice CT: A Feasibility Study. Selçuk Tıp Dergisi, Cilt: 37 - Sayı: 1, 64–69. https://ajindex.com/articles/318987

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