A system for planning a surgical treatment procedure, the system comprising: a computing device including a memory and at least one processor; and a program stored in the memory that, when executed by the processor, presents a user interface that guides a user through the planning of the surgical treatment procedure, the user interface including: a treatment zone setting view presenting at least one slice of a 3D reconstruction generated from the CT image data, the treatment zone setting view including a target, the treatment zone setting view further presenting a treatment zone marker including an adjustable boundary ring, the treatment zone marker being positioned over the target, the treatment zone marker defining a location and a size of a treatment zone, the treatment zone setting view configured to adjust the position and/or size of the treatment zone marker relative to the target in response to a received user input; and a volumetric view presenting a 3D volume derived from the 3D reconstruction and a 3D representation of the treatment zone marker relative to structures depicted in the 3D volume; wherein the at least one slice of the treatment zone setting view includes a representation of an instrument; wherein an orientation and a position of the representation of the instrument is adjustable in response to a received user input to adjust an orientation and position of the treatment zone marker in the treatment zone setting view, and wherein the treatment zone setting view includes a user-selectable power level setting having a corresponding predetermined maximum and minimum diameter thresholds for the boundary ring and an alert is generated when the user adjusts the diameter of the boundary ring to a diameter that is larger than the predetermined maximum threshold or smaller than the predetermined minimum threshold corresponding to the user selected power level setting. a computing device including a memory and at least one processor; and a program stored in the memory that, when executed by the processor, presents a user interface that guides a user through the planning of the surgical treatment procedure, the user interface including: a treatment zone setting view presenting at least one slice of a 3D reconstruction generated from the CT image data, the treatment zone setting view including a target, the treatment zone setting view further presenting a treatment zone marker including an adjustable boundary ring, the treatment zone marker being positioned over the target, the treatment zone marker defining a location and a size of a treatment zone, the treatment zone setting view configured to adjust the position and/or size of the treatment zone marker relative to the target in response to a received user input; and a volumetric view presenting a 3D volume derived from the 3D reconstruction and a 3D representation of the treatment zone marker relative to structures depicted in the 3D volume; wherein the at least one slice of the treatment zone setting view includes a representation of an instrument; wherein an orientation and a position of the representation of the instrument is adjustable in response to a received user input to adjust an orientation and position of the treatment zone marker in the treatment zone setting view, and wherein the treatment zone setting view includes a user-selectable power level setting having a corresponding predetermined maximum and minimum diameter thresholds for the boundary ring and an alert is generated when the user adjusts the diameter of the boundary ring to a diameter that is larger than the predetermined maximum threshold or smaller than the predetermined minimum threshold corresponding to the user selected power level setting. a treatment zone setting view presenting at least one slice of a 3D reconstruction generated from the CT image data, the treatment zone setting view including a target, the treatment zone setting view further presenting a treatment zone marker including an adjustable boundary ring, the treatment zone marker being positioned over the target, the treatment zone marker defining a location and a size of a treatment zone, the treatment zone setting view configured to adjust the position and/or size of the treatment zone marker relative to the target in response to a received user input; and a volumetric view presenting a 3D volume derived from the 3D reconstruction and a 3D representation of the treatment zone marker relative to structures depicted in the 3D volume; wherein the at least one slice of the treatment zone setting view includes a representation of an instrument; wherein an orientation and a position of the representation of the instrument is adjustable in response to a received user input to adjust an orientation and position of the treatment zone marker in the treatment zone setting view, and wherein the treatment zone setting view includes a user-selectable power level setting having a corresponding predetermined maximum and minimum diameter thresholds for the boundary ring and an alert is generated when the user adjusts the diameter of the boundary ring to a diameter that is larger than the predetermined maximum threshold or smaller than the predetermined minimum threshold corresponding to the user selected power level setting.