selecting text right after a radio button using xpath

Hello,

This is a tough one to crack.

My application generates a set of radio buttons dynamicaly like so

***********

                 <input type="radio" name="response_to_item.24306" 
value="24310" id="show_item_form:elements:response_to_item.24306:24310" 
checked="checked" />  MD<br>
              
                 <input type="radio" name="response_to_item.24306" 
value="24311" id="show_item_form:elements:response_to_item.24306:24311"  />  
PhD<br>
              
                 <input type="radio" name="response_to_item.24306" 
value="24312" id="show_item_form:elements:response_to_item.24306:24312"  />  
ScD<br>

              
                 <input type="radio" name="response_to_item.24306" 
value="24313" id="show_item_form:elements:response_to_item.24306:24313"  />  
PharmD<br>
              
                 <input type="radio" name="response_to_item.24306" 
value="24314" id="show_item_form:elements:response_to_item.24306:24314"  />  
EdD<br>
              
                 <input type="radio" name="response_to_item.24306" 
value="24315" id="show_item_form:elements:response_to_item.24306:24315"  />  
RN<br>
              
                 <input type="radio" name="response_to_item.24306" 
value="24316" id="show_item_form:elements:response_to_item.24306:24316"  />  
Other/Additional (please specify below)<br>

************

I need to click the radio button based on the text right after it.  Selenium 
allows me to click on a radio button by doing something like

click    //input[@value='24310']

but the problem is that the values of the checkboxes are dynamically 
generated, on the text after the dynamically generated radio button is not.

Is there a way to have selenium select the radio button that precedes a 
matching string ?

For example I want to select the radio button that corresponds to 'MD'.

Thanks,

Hamilton