Ex-vivo magnetic resonance angiography to explore placental vascular anatomy

Abstract Background The use of soft tissue fillers for facial rejuvenation is increasing rapidly and the complications, unfortunately, follow the same path. Blindness caused by intravascular filler injections is a rare but devastating complication. Knowledge of the individual arterial anatomy may aid the injector in avoiding injecting into an artery. Increasing the awareness about and illustration of the extreme variations in the individual vascular anatomy and subsequently procuring information for the accurate planning of those, so called, minimally invasive procedures may help to prevent blindness. Objectives To evaluate if the use of Magnetic Resonance Angiography (MRA) may visualise the arterial facial anatomy in a contrast- and radiation-free way and study the individual arterial variations using an augmented reality (AR) image. Methods The individual arterial anatomy of the three terminal branches of the Ophthalmic Artery (Supraorbital (SO); Supratrochlear (STr); and Dorsal Nasal (DN) arteries) of 20 volunteers was studied by a 3 Tesla MRI, adapting a recently published imaging technique, combining infrared (IR) facial warming and 3D-TOF MOTSA MRA. The resulting visualisation of the facial arteries was shown on the patient’s face through AR technology. Results The MRA was able to visualise the SO in 90.0%, STr in 92.5%, and DN arteries in 75% of the examined patients, as well as numerous variations in both vessel localization and path. Furthermore, a proof-of-concept of the AR-visualisation of the individual arterial anatomy was successfully implemented. Conclusions Dermal filler injectors should be aware of the risk of filler-induced blindness and familiarise themselves with the visualisation of the variable facial vascular anatomy around the eye. The implementation of a one-time MRA and subsequent AR-visualisation may be useful in the accurate planning of minimally invasive facial rejuvenation procedures.

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Comparative Study of Three Preoperative Imaging Modalities for the Evaluation and Design of Superficial Circumflex Iliac Artery Perforator Flap: Color Doppler Ultrasound, Computed Tomography Angiography and Magnetic Resonance Angiography

Iranian Journal of Radiology ◽

10.5812/iranjradiol.97168 ◽

2020 ◽

Vol 17 (3) ◽

Author(s):

Zhuowei Tian ◽

Shizhe Wang ◽

Yue He ◽

Chunyue Ma

Keyword(s):

Computed Tomography ◽

Magnetic Resonance ◽

Magnetic Resonance Angiography ◽

Iliac Artery ◽

Computed Tomography Angiography ◽

Color Doppler ◽

Vascular Anatomy ◽

Color Doppler Ultrasound ◽

Tof Mra ◽

Artery Perforator

Background: Superficial circumflex iliac artery perforator (SCIP) flap is a promising reconstructive candidate for head and neck, trunk and extremity reconstruction. In order to reduce intraoperative errors, preoperative planning is essential for evaluation of the possible variations in vascular anatomy of the groin region. However, the use of these modalities has not been compared. Objectives: The three commonly used imaging modalities [color Doppler ultrasound (CDUS), computed tomography angiography (CTA), and magnetic resonance angiography (MRA)] were therefore compared in this study for the relative accuracy in the SCIP flap planning. Patients and Methods: This study was conducted on eight patients who underwent CDUS, CTA and MRA [3-dimensional time-of-flight magnetic resonance angiography, (3D TOF-MRA)] and received reconstructions with the SCIP flaps for head and neck defects. The perforators’ locations, courses and calibers were measured or marked for each flap. These imaging preoperative measurements were later compared with intraoperative findings. Results: CDUS, CTA and 3D TOF-MRA were able to effectively identify the courses of the perforators. 3D TOF-MRA was more accurate at measuring the pedicle calibers of SCIP flaps in comparison with CTA and CDUS. Conclusion: Three D-TOF-MRA may be a more valuable imaging modality for the preoperative assessment of the vascular anatomy of SCIP flaps.

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High-resolution ex vivo magnetic resonance angiography: a feasibility study on biological and medical tissues

BMC Physiology ◽

10.1186/1472-6793-10-3 ◽

2010 ◽

Vol 10 (1) ◽

pp. 3 ◽

Cited By ~ 18

Author(s):

Anne S Rasmussen ◽

Henrik Lauridsen ◽

Christoffer Laustsen ◽

Bjarke G Jensen ◽

Steen F Pedersen ◽

...

Keyword(s):

Magnetic Resonance ◽

High Resolution ◽

Magnetic Resonance Angiography ◽

Feasibility Study ◽

Ex Vivo

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Temporal profile of the vascular anatomy evaluated by 9.4-tesla magnetic resonance angiography and histological analysis in mice with the R4859K mutation of RNF213 , the susceptibility gene for moyamoya disease

Brain Research ◽

10.1016/j.brainres.2015.07.039 ◽

2015 ◽

Vol 1624 ◽

pp. 497-505 ◽

Cited By ~ 29

Author(s):

Atsushi Kanoke ◽

Miki Fujimura ◽

Kuniyasu Niizuma ◽

Akira Ito ◽

Hiroyuki Sakata ◽

...

Keyword(s):

Magnetic Resonance ◽

Magnetic Resonance Angiography ◽

Moyamoya Disease ◽

Histological Analysis ◽

Susceptibility Gene ◽

Vascular Anatomy ◽

Temporal Profile

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Infrared Thermally Enhanced 3-Dimensional Time of Flight Magnetic Resonance Angiography Imaging for the Visualization of the Arteries of the Face

Aesthetic Surgery Journal Open Forum ◽

10.1093/asjof/ojaa020 ◽

2020 ◽

Vol 2 (2) ◽

Cited By ~ 2

Author(s):

Benoit Hendrickx ◽

Karl Waked ◽

Marc Mespreuve

Keyword(s):

Magnetic Resonance ◽

Magnetic Resonance Angiography ◽

Imaging Technique ◽

Time Of Flight ◽

Vascular Anatomy ◽

Maximum Intensity Projection ◽

External Carotid Artery ◽

External Carotid ◽

3 Dimensional ◽

The Face

Abstract Background The face is known for its extreme variation in vascular anatomy. Furthermore, the rapidly increasing number of filler treatments leads to an increase in severe filler-associated complications (such as skin necrosis and blindness) due to intra-arterial injection. Visualizing a patient’s individual complete facial arterial anatomy in a contrast- and radiation-free way has not been published before. This innovative imaging technique could, therefore, enhance the safety of minimally invasive surgical procedures as it provides a harmless way to map the arteries of the face. Objectives Evaluate a newly developed imaging technique to visualize the arteries of the face in a noninvasive and radiation-free manner. Methods The individual arterial facial anatomy of 20 volunteers was studied by an imaging technique, combining infrared (IR) facial warming and 3-dimensional (3D) time of flight (TOF) magnetic resonance angiography (MRA). The source and maximum intensity projection images were assessed by 2 investigators, familiar with the anatomy of the face. Results The MRA technique visualized most of the main facial arteries, albeit in a variable way. The main facial branches of the external carotid artery (facial, angular, supralabial, and superficial temporal arteries) were illustrated well, whereas the visualization of the internal carotid branches (supratrochlear and supraorbital arteries) and nasal branches (dorsal nasal and lateral nasal arteries) was less consistent. Conclusions The combination of IR “heat-induced enhancement” and a 3D-TOF MRA sequence may actually be an important step toward the visualization of the variable facial vascular anatomy in a noninvasive, radiation-free, and contrast-free manner.

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