Optimizing Image Quality in Cerebral 3D Rotational Angiography: A Study on the Impact of Voxel Size.

Background And Purpose: 3D rotational angiography (3DRA) is a crucial diagnostic tool for assessing neurovascular diseases. Despite its superior spatial resolution, challenges arise in visualizing minute vasculatures. This study investigates the impact of voxel size on the spatial resolution and noise of cerebral 3DRA.

Minimizing eye lens radiation exposure using lens tracking in neurointerventional procedures: retrospective clinical and phantom study.

Background: The eye lens is particularly vulnerable to radiation during endovascular treatments for intracranial aneurysms due to prolonged exposure under high magnification. This study presents a lens tracking method to monitor lens positions during procedures and estimate radiation doses using a phantom.

Methods: A consecutive series of patients treated between January and March 2023 were retrospectively reviewed.

Radiation dose reduction and image quality enhancement for patients unable to elevate their arms in chest CT: A comparative study.

Purpose: To propose a method to effectively reduce radiation dose while enhancing image quality in chest CT for patients unable to elevate their arms utilizing the air-gap technique.

Methods: Chest CT images were acquired in three positions: arms raised (control group, position A), arms lowered with the air-gap technique utilizing an in-house device (position B), and arms lowered without the device (position C). Data were categorized by body weight.

Effectiveness of wedge filter application in reducing lens radiation dose during diagnostic cerebral angiography: a phantom and prospective study.

Objective: Diagnostic cerebral angiography poses a risk of direct radiation exposure to the eye lens. This study aimed to evaluate the effectiveness of using a wedge filter to reduce lens exposure during examination.

Methods: A phantom study was initially conducted to evaluate the efficacy and determine the optimal depth of the wedge filter.

Safety and Effectiveness of a Novel Integrated Angiography System for Continuous Guidance and Flushing in Diagnostic Cerebral Catheter Angiography: A Randomized Controlled Trial.

Background And Purpose: The guided angiography system, an integrated angiography system, enables continuous guidance and flushing during diagnostic procedures. A guidewire provides guidance by remaining inside the catheter during contrast injection into tortuous vessels. While its feasibility was demonstrated in a retrospective study, this randomized controlled trial aims to evaluate its safety and effectiveness.

Impact of Patient Head Posture on Lens Radiation Exposure During Cerebral Angiography.

Background And Purpose: Cerebral angiography remains crucial for detailed characterization and preoperative assessments for intracranial aneurysm. Despite its diagnostic importance, cerebral angiography poses challenges due to its invasiveness, the risk of neurologic complications, and radiation exposure. To investigate the impact of head posture on lens radiation exposure during cerebral angiography, this study focused on the correlation between radiation doses to the eye lens, head flexion angles, and head size.

In Vitro Head-to-Head Comparison of Flow Reduction between Fibered and Non-Fibered Pushable Coils.

Purpose: To compare the embolization effects of a non-fibered pushable coil with a conventional fibered pushable coil in an in vitro bench-top experiment.

Materials And Methods: A simplified vascular phantom with 4 channels (1 for the non-fibered coil, 1 for the fibered coil, and 2 for continuous circuit flow) was used. A single coil of the longest length was inserted to evaluate the effect of single-coil embolization, and 3 consecutive coils were inserted to assess the effect of multiple-coil embolization.

Impact of a selective lens dose reduction protocol in 3D rotational angiography on radiation exposure to the eye lens during cerebral angiography: a randomized controlled trial.

Background: We aimed to investigate the radiation dose to the eye lens (lens dose) during cerebral angiography and to evaluate the effectiveness of the lens dose reduction protocol for 3-dimensional rotational angiography (3D-RA) in reducing overall lens dose exposure.

Methods: We conducted a randomized, controlled clinical trial at a tertiary hospital with patients undergoing cerebral angiography. The lens dose reduction protocol in 3D-RA involved raising the table to position the patient's eye lens away from the rotation axis.

Reduction of Radiation Dose to Eye Lens in Cerebral 3D Rotational Angiography Using Head Off-Centering by Table Height Adjustment: A Prospective Study.

Objective: Three-dimensional rotational angiography (3D-RA) is increasingly used for the evaluation of intracranial aneurysms (IAs); however, radiation exposure to the lens is a concern. We investigated the effect of head off-centering by adjusting table height on the lens dose during 3D-RA and its feasibility in patient examination.

Materials And Methods: The effect of head off-centering during 3D-RA on the lens radiation dose at various table heights was investigated using a RANDO head phantom (Alderson Research Labs).

Feasibility of a silicone vascular phantom replicating real arterial contrast filling dynamics on cerebral angiography: An in-vitro pilot study.

Some cerebral arterial silicone phantoms have been used in preclinical evaluations. However, typical silicone-based phantoms are limited in their capacity to reproduce real contrast filling dynamics of the human cerebral artery. This study aimed to develop a cerebral arterial silicone phantom to analyze the feasibility of real contrast filling dynamics.

Trends of Expanding Indications of Woven EndoBridge Devices for the Treatment of Intracranial Aneurysms: A Systematic Review and Meta-analysis.

Purpose: Woven EndoBridge (WEB) was introduced for the endovascular therapy of wide-neck intracranial aneurysms. The safety and efficacy have been evaluated through several meta-analyses. However, these reviews did not cover the expanding indications in detail.

Safety and Effectiveness of the Novel Catheter 3.0 System for Diagnostic Cerebral Angiography: A Pilot Study.

Purpose: The purpose of this study was to evaluate the safety and effectiveness of a new angiographic system (Catheter 3.0 system) using a 5 French (Fr), large-bore angiography catheter, a 0.032-inch stiff guidewire, and a continuous flushing system in diagnostic cerebral angiography.

A modified method of elastase-induced saccular aneurysm creation in rabbits: Schematic representation of the method.

Background: The purpose of our study was to investigate the safety and effectiveness of a modified technique using a short guiding catheter for instillation of elastase in comparison with the previously described method of creating elastase-induced aneurysm in rabbits.

Methods: Following right common carotid artery (RCCA) access using an arterial sheath and inflating the Fogarty balloon in the subclavian artery, a short guiding catheter was used for the instillation of the elastase in the experimental group (n = 5) while it was performed with a microcatheter in the control group (n = 5). The procedure duration was recorded from the RCCA puncture to the sheath removal.