A system, comprising: a console comprising: an ultrasound-producing mechanism configured to convert an electric current into a vibrational energy; and a driving-parameter modifier configured to modify driving parameters to selectively provide one or more output modes for the vibrational energy; and a catheter assembly comprising: a sheath comprising a sheath lumen; and a core wire at least partially disposed within the sheath lumen comprising a proximal portion and a distal portion of the core wire, wherein: the proximal portion of the core wire is coupled to the ultrasound-producing mechanism; and a working length of the distal portion of the core wire beyond the sheath is configured for longitudinal, transverse, or longitudinal and transverse displacement in accordance with the one or more output modes for the vibrational energy to effect different intravascular lesion-modification procedures, wherein the driving-parameter modifier is configured to modify at least the driving parameters selected from pulse repetition frequency, duty cycle, and a combination of the pulse repetition frequency and the duty cycle to effect the different intravascular lesion-modification procedures. a console comprising: an ultrasound-producing mechanism configured to convert an electric current into a vibrational energy; and a driving-parameter modifier configured to modify driving parameters to selectively provide one or more output modes for the vibrational energy; and an ultrasound-producing mechanism configured to convert an electric current into a vibrational energy; and a driving-parameter modifier configured to modify driving parameters to selectively provide one or more output modes for the vibrational energy; and a catheter assembly comprising: a sheath comprising a sheath lumen; and a core wire at least partially disposed within the sheath lumen comprising a proximal portion and a distal portion of the core wire, wherein: the proximal portion of the core wire is coupled to the ultrasound-producing mechanism; and a working length of the distal portion of the core wire beyond the sheath is configured for longitudinal, transverse, or longitudinal and transverse displacement in accordance with the one or more output modes for the vibrational energy to effect different intravascular lesion-modification procedures, wherein the driving-parameter modifier is configured to modify at least the driving parameters selected from pulse repetition frequency, duty cycle, and a combination of the pulse repetition frequency and the duty cycle to effect the different intravascular lesion-modification procedures. a sheath comprising a sheath lumen; and a core wire at least partially disposed within the sheath lumen comprising a proximal portion and a distal portion of the core wire, wherein: the proximal portion of the core wire is coupled to the ultrasound-producing mechanism; and a working length of the distal portion of the core wire beyond the sheath is configured for longitudinal, transverse, or longitudinal and transverse displacement in accordance with the one or more output modes for the vibrational energy to effect different intravascular lesion-modification procedures, wherein the driving-parameter modifier is configured to modify at least the driving parameters selected from pulse repetition frequency, duty cycle, and a combination of the pulse repetition frequency and the duty cycle to effect the different intravascular lesion-modification procedures. the proximal portion of the core wire is coupled to the ultrasound-producing mechanism; and a working length of the distal portion of the core wire beyond the sheath is configured for longitudinal, transverse, or longitudinal and transverse displacement in accordance with the one or more output modes for the vibrational energy to effect different intravascular lesion-modification procedures, wherein the driving-parameter modifier is configured to modify at least the driving parameters selected from pulse repetition frequency, duty cycle, and a combination of the pulse repetition frequency and the duty cycle to effect the different intravascular lesion-modification procedures.