Filtered back projection revisited in low-kilovolt computed tomography angiography: sharp filter kernel enhances visualization of the artery of Adamkiewicz

Nishii, Tatsuya; Kotoku, Akiyuki; Hori, Yoshiro; Matsuzaki, Yuji; Watanabe, Yoshiaki; Morita, Yoshiaki; Kono, Atsushi K.; Matsuda, Hitoshi; Fukuda, Tsuyoshi

doi:10.1007/s00234-018-2136-8

Cited by 12 publications

(9 citation statements)

References 23 publications

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“…SCI is a devastating TEVAR complication, with a reported incidence range of 3–10% [ 2 ]. A multi-disciplinary approach to prevent SCI was reported [ 1 ] since preoperative computed tomography angiography was introduced as a reliable method to visualize AKA [ 3 ]. As a measure to prevent SCI, prophylactic cerebrospinal fluid drainage (CSFD) has been considered prior to thoraco-abdominal replacement.…”

Section: Discussionmentioning

confidence: 99%

Thoracic endovascular aortic repair with collateral vessels from the femoral artery to Adamkiewicz’s artery

Noda

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Nishii

et al. 2023

Interdisciplinary CardioVascular and Thoracic Surgery

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Identification of the Adamkiewicz’s artery (AKA) prior to the operation is one of the spinal cord ischaemia preventive measures. A 75-year-old man presented with the rapid expansion of thoracic aortic aneurysm. Collateral vessels from the right common femoral artery to the AKA were observed on preoperative computed tomography angiography. The stent graft was successfully deployed through the contralateral side via a pararectal laparotomy to avoid collateral vessel injury supplying the AKA. This case highlights the significance of preoperative identification of collateral vessels to the AKA.

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Section: Discussionmentioning

confidence: 99%

Thoracic endovascular aortic repair with collateral vessels from the femoral artery to Adamkiewicz’s artery

Noda

Seike

Nishii

et al. 2023

Interdisciplinary CardioVascular and Thoracic Surgery

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“…Their results seem to be superior to those of our study. However, accurate localisation of the AKA may not have been established because previous studies [8,[13][14][15] did not conduct spinal conventional selective angiography. The most reliable way to visualise the AKA is with conventional selective arterial angiography [16].…”

Section: Discussionmentioning

confidence: 99%

Detection of the artery of Adamkiewicz using multidetector row computed tomography in patients with spinal arteriovenous shunt disease

et al. 2020

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Purpose: To plan a treatment strategy for a spinal arteriovenous shunt (SAVS), identifying the artery of Adamkiewicz (AKA) and its origin is indispensable. However, detecting the AKA is very difficult in patients with an SAVS when using computed tomography angiography (CTA) by the usual method to find the hairpin curved artery because dilated drainage veins nearly always coexist with the hairpin curved AKA. We designed a method to identify the AKA by focusing on the diameter and pathway of the anterior radiculomedullary arteries (RMAs). Material and methods: Seven consecutive patients with an SAVS were surveyed. They underwent contrast-enhanced CTA and conventional angiography from January 2009 to December 2012. Two readers evaluated the CTA images and assumed that the AKA was the artery that ran through the anterior portion of the neural foramen and continued to pass on the ventral side of the spinal cord. Results: Among the seven patients, nine AKAs were detected with conventional angiography. When using our method, seven AKAs and six AKAs were identified on CTA by Reader 1 and Reader 2, respectively. The average sensitivity was 72.3%, and the specificity, accuracy, positive predictive value, and negative predictive value were sufficiently high (i.e. > 85%) for both readers. The kappa value for detecting the AKA was 0.98. Conclusions: Detecting the origin of the AKA with CTA is challenging in patients with an SAVS. However, focusing on the diameter and pathway of the RMAs may allow successful identification.

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“…Since 2011, CT angiography with a 16- or 64-channel multidetector-row helical CT scanner has been applied. The scan covered the area from the 7th thoracic vertebra to the 3rd lumbar vertebra and the rate of detection have been reported about 95% [ 10 ]. Procedures were performed under general anaesthesia, and motor-evoked potentials monitoring was made to perceive the possibility of spinal cord injury (SCI) in all patients [ 11 ].…”

Section: Methodsmentioning

confidence: 99%

Lower-profile stent graft reduces the risk of embolism during thoracic endovascular aortic repair in shaggy aorta

Seike

Masada

Fukuda

et al. 2023

Interdisciplinary CardioVascular and Thoracic Surgery

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OBJECTIVES This study aimed to reveal the association between lower-profile stent graft and embolism during thoracic endovascular aortic repair for non-dissecting distal arch and descending thoracic aortic aneurysm. METHODS This study reviewed data of 35 patients who underwent thoracic endovascular aortic repair with lower-profile stent graft (27 males; age: 77 ± 9.2 years) and 312 who underwent thoracic endovascular aortic repair with conventional-sized stent graft (247 males; age: 77 ± 7.4 years) from 2009 to 2021. RESULTS The rate of total embolic events was significantly lower in lower-profile stent graft group (0/35 [0%]) than the conventional-sized stent graft group (34/312 [11.2%]) (p = 0.035). Shaggy aorta (odds ratio: 5.220; p < 0.001) were identified as positive embolic event predictors. The rate of total embolic events in 68 patients with shaggy aorta (12 in lower-profile stent graft/56 in conventional-sized stent graft) was significantly lower in the lower-profile stent graft group (0/12 [0%]) than the conventional-sized stent graft group (19/56 [34%]) (p = 0.015). The rate of total embolic events in 279 patients with the non-shaggy aorta (23 in lower-profile stent graft/256 in conventional-sized stent graft) reveals no difference between the two groups (0 [0%]/16 [6.3%]) (p = 0.377). CONCLUSIONS Lower-profile stent graft usage could reduce embolism in thoracic endovascular aortic repair, and the difference was more pronounced in patients with the shaggy aorta. Lower-profile stent graft might be beneficial in preventing embolism in thoracic endovascular aortic repair for patients with a shaggy aorta.

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Filtered back projection revisited in low-kilovolt computed tomography angiography: sharp filter kernel enhances visualization of the artery of Adamkiewicz

Cited by 12 publications

References 23 publications

Thoracic endovascular aortic repair with collateral vessels from the femoral artery to Adamkiewicz’s artery

Thoracic endovascular aortic repair with collateral vessels from the femoral artery to Adamkiewicz’s artery

Detection of the artery of Adamkiewicz using multidetector row computed tomography in patients with spinal arteriovenous shunt disease

Lower-profile stent graft reduces the risk of embolism during thoracic endovascular aortic repair in shaggy aorta

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