A device that is configured to be inserted into a body lumen, comprising: an elongate shaft comprising a proximal end and a distal end; an expandable assembly configured to transition from a radially compact state to a radially expanded state; a flexible printed circuit board (flex-PCB) substrate; a plurality of electronic elements coupled to the flex-PCB substrate and configured to at least one of receive or transmit an electrical signal; and a plurality of communication paths positioned at least one of on or within the flex-PCB substrate and selectively coupling the plurality of electronic elements to a plurality of electrical contacts configured to electrically connect to an electronic module configured to process the electrical signal, wherein the plurality of electronic elements comprises a plurality of ultrasound transducers (340, 342, 524, 800), the expandable assembly comprises at least two splines (120, 120a-120c) including a first spline (120, 120a - 120c) and a second spline (120, 120a-120c), with at least two ultrasound transducers (340, 342, 524, 800) of the plurality of ultrasound transducers (340, 342, 524, 800) mounted to each spline (120, 120a-120c), and the at least two ultrasound transducers (340, 342, 524, 800) mounted to the first spline (120, 120a - 120c) are linearly staggered from at least two ultrasound transducers (340, 342, 524, 800) mounted to the second spline (120, 120a - 120c), such that a protrusion of one of the ultrasound transducer (340, 342, 524, 800) on the first spline (120, 120a - 120c) extends between protrusions of the at least two ultrasound transducers (340, 342, 524, 800) on the second spline (120, 120a-120c). an elongate shaft comprising a proximal end and a distal end; an expandable assembly configured to transition from a radially compact state to a radially expanded state; a flexible printed circuit board (flex-PCB) substrate; a plurality of electronic elements coupled to the flex-PCB substrate and configured to at least one of receive or transmit an electrical signal; and a plurality of communication paths positioned at least one of on or within the flex-PCB substrate and selectively coupling the plurality of electronic elements to a plurality of electrical contacts configured to electrically connect to an electronic module configured to process the electrical signal, wherein the plurality of electronic elements comprises a plurality of ultrasound transducers (340, 342, 524, 800), the expandable assembly comprises at least two splines (120, 120a-120c) including a first spline (120, 120a - 120c) and a second spline (120, 120a-120c), with at least two ultrasound transducers (340, 342, 524, 800) of the plurality of ultrasound transducers (340, 342, 524, 800) mounted to each spline (120, 120a-120c), and the at least two ultrasound transducers (340, 342, 524, 800) mounted to the first spline (120, 120a - 120c) are linearly staggered from at least two ultrasound transducers (340, 342, 524, 800) mounted to the second spline (120, 120a - 120c), such that a protrusion of one of the ultrasound transducer (340, 342, 524, 800) on the first spline (120, 120a - 120c) extends between protrusions of the at least two ultrasound transducers (340, 342, 524, 800) on the second spline (120, 120a-120c).