Abstract: A method for shaping an RF pulse for use with an MRI system includes shaping an RF pulse for use with an MRI system that uses an RF coil. The RF pulse is shaped to reduce changes in B1 amplitude and in an off-resonance effect with respect to Larmor frequency as a function of distance from the RF coil.

Abstract: A system for NMR/MRI, having X, Y, Z directions, includes an RF coil having a B0 static magnetic field in the Z direction and a transverse B1 RF magnetic field in the XY directions. Currents in the RF coil are distributed so that the transverse B1 field is substantially uniform in the XY plane.

Abstract: A method for shaping an RF pulse for use with an MRI system includes shaping an RF pulse for use with an MRI system that uses an RF coil. The RF pulse is shaped to reduce changes in B1 amplitude and in an off-resonance effect with respect to Larmor frequency as a function of distance from the RF coil.

Abstract: A pulmonary measurement system includes a pulmonary measurement device that includes a mouthpiece with an airflow path and a sensor positioned in the airflow path; and a controller communicably coupled to the sensor. The controller includes a processor and instructions stored in memory and is operable to execute the instructions with the processor to perform operations including identifying a measurement from the sensor; identifying a particular equation stored in the memory, the particular equation developed using data analytics and including an input parameter that is based on the identified measurement; and based on the identified measurement and the particular equation, determining a value of absolute lung volume.

Abstract: A pulmonary function testing (PFT) system includes a PFT device operable to receive a respiratory airflow from a patient through an airflow chamber; a mouthpiece coupled to the PFT device and in airflow communication with the airflow chamber, the mouthpiece including a bacterial filter and associated with a unique identifier and patient data; and a control system communicably coupled with the mouthpiece and the PFT device. The control system is configured to perform operations including interpreting at least one of the unique identifier or the patient data associated with the mouthpiece; and based on the interpretation, adjusting a status of the PFT device to determine a pulmonary function parameter.

Abstract: An apparatus includes a mouthpiece to communicate an airflow between a user and an airflow chamber in fluid communication with the mouthpiece; an interrupter in fluid communication with the airflow chamber and adapted to initiate an occlusion event by adjusting between an open state and a closed state, such that fluid communication is at least partially prevented between the airflow chamber and ambient air during the occlusion event initiated by the interrupter; a container in fluid communication with the airflow chamber; a flow rate sensor in fluid communication with the airflow chamber and adapted to measure an airflow exchange between the airflow chamber and the container during the occlusion event; and a controller adapted to determine an instantaneous lung volume based on the measured airflow exchange between the airflow chamber and the container.