Searching for a truly “iso-metabolic” gas challenge in physiological MRI
… Moreover, cerebral blood flow response to the hypercapnic-hypoxia challenge (in terms of
% … hypercapnic-hypoxia gas challenge may be a useful maneuver in physiological MRI as it …
% … hypercapnic-hypoxia gas challenge may be a useful maneuver in physiological MRI as it …
Using MRI to study the alterations in liver blood flow, perfusion, and oxygenation in response to physiological stress challenges: Meal, hyperoxia, and hypercapnia
… meal challenge, but only four completed the gas challenge. … the gas challenge was low
compared with the meal challenge, … feasibility of performing a gas challenge in a clinical setting. …
compared with the meal challenge, … feasibility of performing a gas challenge in a clinical setting. …
[HTML][HTML] Respiratory challenge MRI: practical aspects
FC Moreton, KA Dani, C Goutcher, K O'Hare… - NeuroImage: Clinical, 2016 - Elsevier
… and cessation of a gas challenge allows repeated measurements during MRI (unlike …
has therefore been used to: demonstrate physiological impairments such as reduced vascular …
has therefore been used to: demonstrate physiological impairments such as reduced vascular …
MRI mapping of cerebrovascular reactivity via gas inhalation challenges
… while the subject is lying inside the MRI scanner. Using this … Physiological parameters and
MRI images were recorded … room-air and hypercapnic gas breathing. Representative results …
MRI images were recorded … room-air and hypercapnic gas breathing. Representative results …
Oxygen‐sensitive MRI assessment of tumor response to hypoxic gas breathing challenge
… In order to allow for physiological stabilization, especially after the change of breathing …
the oxygen-sensitive MRI response of tumors to hypoxic gas breathing challenge. BOLD and …
the oxygen-sensitive MRI response of tumors to hypoxic gas breathing challenge. BOLD and …
Cerebrovascular reactivity (CVR) MRI with CO2 challenge: a technical review
… in MRI-compatible gas delivery apparatus. In this review, we first discuss the physiological
basis of … We then review the methodological aspects of CVR mapping, including gas delivery …
basis of … We then review the methodological aspects of CVR mapping, including gas delivery …
Cerebrovascular reactivity mapping without gas challenges: a methodological guide
… without the need for external gas challenges have been proposed. … Despite the multitude
of alternatives to gas challenges, … based on MRI and CO 2 variations without gas challenges, …
of alternatives to gas challenges, … based on MRI and CO 2 variations without gas challenges, …
Fast and sensitive dynamic oxygen‐enhanced MRI with a cycling gas challenge and independent component analysis
… gas challenge and independent component analysis (ICA), we sought to improve the sensitivity
and speed of existing oxygen enhanced MRI (OE-MRI… of the physiological response. The …
and speed of existing oxygen enhanced MRI (OE-MRI… of the physiological response. The …
Cerebrovascular reactivity measurements using 3T BOLD MRI and a fixed inhaled CO2 gas challenge: Repeatability and impact of processing strategy
E Sleight, MS Stringer, I Mitchell, M Murphy… - … in physiology, 2023 - frontiersin.org
… Familiarising the participants with the gas challenge prior to the CVR scan is essential to
avoid anxiety and to minimise differences in baseline physiological state between repeated …
avoid anxiety and to minimise differences in baseline physiological state between repeated …
Multiparametric imaging of brain hemodynamics and function using gas-inhalation MRI
… BAT is obtained from the voxel-wise delay between the physiological (ie end-tidal CO 2
and … The order of the concomitant and single-gas challenges was randomized and …
and … The order of the concomitant and single-gas challenges was randomized and …