Transcranial magnetic stimulation (TMS) applied to a left dorsolateral prefrontal cortex (DLPFC) area with specific connectivity profile the subgenual anterior cingulate (sgACC) has emerged as highly effective non-invasive treatment option for depression. However, antidepressant outcomes demonstrate significant variability among therapy plans and individuals. One overlooked contributing factor is individual brain state at time of treatment. In this study we used interleaved TMS-fMRI...

Supine breast MRI offers several advantages over conventional prone but requires correction of motion artifacts. This study aimed to identify the optimal combination sensors for achieving best quality using a wearable radio frequency coil ("BraCoil"). T2-weighted (T2w) 2D and T1-weighted (T1w) 3D sequences were acquired in 10 volunteers 17 exams. Images reconstructed GRICS algorithm, data from respiratory belt or MRI-compatible accelerometers. The models evaluated by comparing predicted...

Magnetic resonance has become a backbone of medical imaging but suffers from inherently low sensitivity. This can be alleviated by improved radio frequency (RF) coils. Multi-turn multi-gap coaxial coils (MTMG-CCs) introduced in this work are flexible, form-fitting RF extending the concept single-turn single-gap CC introducing multiple cable turns and/or gaps. It is demonstrated that enables free choice coil diameter, and thus, optimizing it for application to certain anatomical site, while...

The aim of this study is the evaluation a wearable radiofrequency coil vest (BraCoil) for supine breast MRI, comparing lesion displacement and size with standard prone MRI ultrasound, assessing its potential impact on clinical workflows targeted ultrasound ultrasound-guided biopsy. data were collected from 11 female patients 18 lesions. Patients underwent two exams: using commercial BraCoil. Lesion positions compared between anatomical landmarks (skin, pectoral muscle, nipple). Statistical...

Background Breast cancer, the most common malignant cancer in women worldwide, is typically diagnosed by x-ray mammography, which an unpleasant procedure, has low sensitivity with dense breasts, and involves ionizing radiation. magnetic resonance imaging (MRI) sensitive modality works without radiation, but currently constrained to prone position due suboptimal hardware, therefore hampering clinical workflow. Objectives The aim of this work improve image quality breast MRI, simplify...

Abstract Magnetic Resonance Imaging (MRI) is a major medical imaging modality, which non-invasive and provides unique soft tissue contrast without ionizing radiation. The successful completion of MRI exams critically depends on patient compliance, and, thus comfort. design, appearance usability local radiofrequency (RF) coils potentially influences the patients’ perception exam. However, systematic investigations empirical evidence for these aspects are missing. A questionnaire specifically...

This paper addresses the scientific and technological challenges related to development of wireless radiofrequency (RF) coils for magnetic resonance imaging (MRI) based on published literature together with authors' interpretation further considerations. Key requirements possible strategies implementation three important subsystems, namely MR receive signal chain, control signaling on-coil power supply, are presented discussed. For RF signals modern MRI setups (e.g. 3 T, 64 channels),...

Flexible form-fitting radiofrequency coils provide high signal-to-noise ratio (SNR) for magnetic resonance imaging (MRI), and in array configuration large anatomical areas of interest can be covered. We propose a modular system - "ModFlex"- flexible lightweight 4-channel coaxial coil arrays 3 T MRI. investigated the performance difference between commercial reference 8- 16-channel ModFlex receive-only systems. In vivo, six targets four regions neck, ankle, spine hip were imaged with novel...

Conventional breast MRI is performed in the prone position with a dedicated coil. This allows high-resolution images without motion, but patient inconsistent that of other imaging modalities or interventions. Supine may be an interesting alternative, respiratory motion becomes issue. Motion correction methods have typically been offline, for instance, corrected were not directly accessible from scanner console. In this work, we seek to show feasibility fast, online, motion-corrected...

Form-fitting coil designs demand highly flexible coils such as twisted pair or coaxial transmission line resonators. Both of these and respective interfacing circuits were investigated receive-only at 7 T. Similar signal-to-noise ratio active detuning performance compared to a standard copper wire demonstrated in bench MRI experiments.

A wearable coil worn like a vest (“BraCoil”) has recently been shown to improve signal-to-noise ratio by factor of up three in supine breast MRI. However, the visualization images is inefficient when using Cartesian views due bent shape along chest wall. We introduce panoramic view similar dental X-ray make reading MRI more efficient reducing number slices 2-4, depending on size.

Recently, we introduced the “BraCoil”, a wearable coil for prone and supine breast imaging designed to overcome several shortcomings in clinical MRI. Here, present vivo performance tests on 12 volunteers with different volumes ranging from 495 mL (bra size 70A) 3020 (90D). SNR gain up factor of three over commercial was found. Acceleration factors 6x4 can be used reasonable g-factors. High-quality images contrasts are presented.

Form-fitting radiofrequency coil arrays have the potential to enhance signal-to-noise ratio, enable faster imaging and improve patient comfort in MRI. We developed a flexible modular array system for 3T MRI (ModFlex) with 16 receive channels. In neck, spine, ankle hip imaging, we measured an SNR gain 4 out of 6 anatomical target regions similar 2 as compared commercial reference coils. The coil’s versatility is beneficial different use cases varying subject sizes.

Investigations of human brain disorders are frequently conducted in rodent models using magnetic resonance imaging. Due to the small specimen size and increase signal-to-noise ratio with static field strength, dedicated small-bore animal scanners can be used acquire high-resolution data. Ultra-high-field (≥7 T) whole-body increasingly available, they also for investigations. Dedicated sensors, this case, radiofrequency coils, required achieve sufficient sensitivity high spatial resolution...

Motivation: This study addresses the challenge of motion artifacts in free-breathing supine breast MRI using a flexible RF coil, aiming to improve image quality and patient comfort. Goal(s): The primary goal is demonstrate feasibility correction beat pilot tones (BPT) combination with GRICS algorithm, requiring no additional on-patient hardware. Approach: A volunteer underwent performing various breathing patterns, while BPT signals were extracted. algorithm was used for retrospective...

Motivation: Supine breast MRI might enable higher image correlation to supine ultrasound (US) and therefore facilitate the clinical workflow. Goal(s): The aim was quantify lesion displacement between US, prone MRI, in Cartesian panoramic views, derive impact on Approach: Using US patient data, spatial measured. For a wearable coil (BraCoil) used. Results: shows comparable position compared contrast MRI. 18% of lesions could only be localized 2nd look or biopsy after BraCoil Impact: with...

Integrated B 0 shimming capability with RF coil arrays has already shown advantages in dense configurations. For highly flexible this approach is a challenge due to the bulky chokes required bypass segmenting capacitors of classical loop coils. In work we present 4-channel coaxial array module integrated requiring only two per shim channel and thereby demonstrate feasibility integrating into arrays.

A standard breast MRI protocol implies prone position. Supine position has multiple advantages; however, it requires motion correction. In this work we present our results on retrospective nonrigid correction of supine 7 healthy volunteers. respiratory belt was used to capture the chest movements. Images were reconstructed online and fully automatically, including physiological data recording its transfer reconstruction server. It shown that application selected method improves image...

Flexible form-fitting radiofrequency coils provide high signal-to-noise ratio during MRI, and in array configuration large anatomical areas of interest can be covered. We propose a modular system - “ModFlex”- flexible lightweight 4-channel coaxial coil arrays for 3T MRI. investigated the performance difference between commercial reference 8- 16-channel ModFlex receive-only systems. The versatility ModFlex, robustness characteristics different use cases gain compared to is...

In this work, we present a new approach for MR mammography with wearable light-weight coil array (“BraCoil”) covering both breasts and the sentinel axillary lymph nodes. The can be worn like vest over T-shirt used either in prone or supine position. presented design might able to overcome numerous shortcomings of current state-of -the-art breast imaging by improving sensitivity, comfort intimacy, shortening measurement time may thereby eventually enable large-scale cancer...