Aspects of the technology described herein relate to collection of ultrasound images depicting needles. Some embodiments include an ultrasound device having a transducer array and configured to use an aperture having a centroid that is closer to a first long side of the transducer array than a second long side of the transducer array. Certain embodiments include instructing a user to begin to insert a needle adjacent at a location that is to a particular long side of the transducer array. Some embodiments include receiving a selection of a particular long side of the transducer array. Certain embodiments include determining that a user has begun to insert a needle at a location that is adjacent to a particular long side of the transducer array.
