Addsome comments about Patient Position :
> // HFS = Head First-Supine, where increasing (positive axis direction) :
> // X -> to the direction pointed to by the patient's oustretched left arm
> // Y -> to the anterior-to-posterior direction in the patient's body
> // Z -> to the feet-to-head direction in the patient's body
>
> // HFP = Head First-Prone, where increasing (positive axis direction) :
> // X -> to the direction pointed to by the patient's oustretched left arm
> // Y -> to the anterior-to-posterior direction in the patient's body
> // Z -> to the feet-to-head direction in the patient's body
>
> // FFS = Feet First-Supine, where increasing (positive axis direction) :
> // X -> to the direction pointed to by the patient's oustretched left arm
> // Y -> to the anterior-to-posterion direction in the patient's body
> // Z -> to the feet-to-head direction in the patient's body
>
> // FFP = Feet First-Prone, where increasing (positive axis direction) :
> // X -> to the direction pointed to by the patient's oustretched left arm
> // Y -> to the posterior-to-anterior direction in the patient's body
> // Z -> to the feet-to-head direction in the patient's body
>
> // HFDR = Head First-Decubitus Right
> // HFDL = Head First-Decubitus Left
> // FFDR = Feet First-Decubitus Right
> // FFDL = Feet First-Decubitus Left
>
> // we can also find
>
> // SEMIERECT
> // SUPINE
>