Isabelle Riederer1, Claus Zimmer2, Daniela Pfeiffer3, Silke Wunderlich4, Holger Poppert4, Ernst J Rummeny5, Armin Huber5. 1. Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany; Department of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany. Electronic address: isabelle.riederer@tum.de. 2. Department of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany. 3. Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany; Biomedical Physics & Munich School of BioEngineering, Technical University of Munich, Garching, Germany. 4. Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany. 5. Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.
Abstract
PURPOSE: To examine CTP of the brain in real patient data after reducing tube current down to 80 mAs to decrease radiation dose. METHODS: CTP was acquired in 60 suspected stroke patients with 80 (n: 30) or 160 (n: 30) mAs. Data were analyzed retrospectively by two independent readers. SNR, perfusion maps and image quality were compared in hypoperfused and non-affected areas. RESULTS: SNR was significantly higher in CTP with 160 mAs compared to 80 mAs (p < 0.001) in non-affected regions, but there was no significant difference in hypoperfused regions. Overall, images with 80 mAs were rated worse than the ones with 160 mAs (3.0 ± 0.7 versus 4.0 ± 0.7), however, still as sufficient to detect proximal vessel occlusions. CONCLUSION: Tube current of 80 mAs is still sufficient for the detection of perfusion deficits of proximal vessel occlusions.
PURPOSE: To examine CTP of the brain in real patient data after reducing tube current down to 80 mAs to decrease radiation dose. METHODS:CTP was acquired in 60 suspected strokepatients with 80 (n: 30) or 160 (n: 30) mAs. Data were analyzed retrospectively by two independent readers. SNR, perfusion maps and image quality were compared in hypoperfused and non-affected areas. RESULTS: SNR was significantly higher in CTP with 160 mAs compared to 80 mAs (p < 0.001) in non-affected regions, but there was no significant difference in hypoperfused regions. Overall, images with 80 mAs were rated worse than the ones with 160 mAs (3.0 ± 0.7 versus 4.0 ± 0.7), however, still as sufficient to detect proximal vessel occlusions. CONCLUSION: Tube current of 80 mAs is still sufficient for the detection of perfusion deficits of proximal vessel occlusions.
Authors: Isabelle Riederer; Daniel Bar-Ness; Melanie A Kimm; Salim Si-Mohamed; Peter B Noël; Ernst J Rummeny; Philippe Douek; Daniela Pfeiffer Journal: Sci Rep Date: 2019-03-27 Impact factor: 4.379
Authors: Gregório Platero Canton; Gustavo José Luvizutto; Pedro Tadao Hamamoto; Marcos Ferreira Minicucci; Gabriel Pinheiro Modolo; André Petean Trindade; Rodrigo Bazan; Juli Thomaz de Souza Journal: J Vasc Bras Date: 2022-01-07