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4D-printed programmable sample-/eluent-actuated solid-phase extraction device for trace metal analysis.
Anal Chim Acta
January 2025
Department of Chemistry, National Chung Hsing University, Taichung City, 402202, Taiwan, ROC. Electronic address:
Background: To integrate valves, manifolds, and solid-phase extraction (SPE) columns into a compact device is technically difficult. Four-dimensional printing (4DP) technologies, employing stimuli-responsive materials in three-dimensional printing (3DP), are revolutionizing the fabrication, functionality, and applicability of stimuli-responsive analytical devices that can show time-dependent shape programming to enable more complex geometric designs and functions. However, 4D-printed stimuli-responsive actuators and valves utilized to control flowing streams in SPE applications remain rare.
View Article and Find Full Text PDFTransvenous embolization of brain arteriovenous malformations featuring multiple draining veins with 4D-DSA: a case series and technical insights.
J Neurointerv Surg
January 2025
Intervention Neuroradiology, CHU Limoges, Limoges, Aquitaine-Limousin-Poitou-Charentes, France
Background: Hemorrhage is a major complication of brain arteriovenous malformations (AVMs) embolization, which can be related to persistent arteriovenous shunts that were not completely occluded during the embolization. In transvenous embolization (TVE) this risk is deemed higher for AVMs larger than 3 cm featuring multiple veins of drainage. Herein, we will discuss a few selected cases where brain AVMs with more than one draining vein were deemed safe for curative embolization with advanced endovascular techniques after a careful anatomical study through the four dimensional-digital subtraction angiography (4D-DSA) imaging.
View Article and Find Full Text PDFImpact of diaphragm motion on dosimetry in lower thoracic spine stereotactic body radiotherapy.
Phys Med
January 2025
Department of Radiation Oncology and Image-Applied Therapy, Graduate School of Medicine, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
Background And Purpose: Free-breathing computed tomography (FBCT) used in treatment planning for lower thoracic (Th8-Th12) spine stereotactic body radiotherapy (SBRT) can cause deviations between planned and irradiated doses due to diaphragm movement (DM). This study analyzed the dosimetric impact of DM on lower thoracic spine SBRT.
Materials And Methods: Data were collected from 19 patients who underwent FBCT and four-dimensional CT (4DCT) during the same session.
The development of patient-specific 3D anatomical models in minimally invasive parathyroidectomy.
Front Endocrinol (Lausanne)
December 2024
Department of Endocrine Surgery, University College London Hospital, London, United Kingdom.
Background: Surgery is the preferred treatment for primary hyperparathyroidism. Minimally invasive parathyroidectomy is only feasible with accurate preoperative localisation. Virtual 3D anatomical models can be constructed from patient-specific CT scans using segmentation software.
View Article and Find Full Text PDFFully 4D-Printed Near-Infrared-Actuated Lab-on-Valve Solid-Phase Extraction Devices.
Anal Chem
December 2024
Department of Chemistry, National Chung Hsing University, Taichung City 402202, Taiwan, ROC.
Four-dimensional printing (4DP) technologies can expand the functionality of stimuli-responsive devices to enable the integration of multiple stimuli-responsive parts into a compact device. Herein, we used digital light processing three-dimensional printing technique, flexible photocurable resins, and photocurable resins of the temperature-responsive hydrogels comprising -isopropylacrylamide (NIPAM), ,'-methylenebis(acrylamide) (MBA), and graphene for 4DP of a lab-on-valve (LOV) solid-phase extraction (SPE) device. This device featured flow manifolds and a monolithic packing connected by four near-infrared (NIR)-actuated temperature-responsive switching valves composed of a poly(NIPAM/MBA) (PNM) ball pushing a flexible membrane.
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